100% worth it. if you dont have a multimeter, buy one for 10-15$ and modify from 1.3k(ohm) to 1.2k(ohm) to start. You will get an instant ~20% gain in hashrate when you plug back in and power up. I am running 1.18k roughly for ~32.3Ghash average poolside, but am having slight stability issues that seems to disable one chip so only 15 run. Im working to resolve that (not sure if its software, hardware, or pencil-mod (DC converter limitation) related) so i can get all 16 chips running which would be a stable 34-35ghash

EDIT: worth noting that a recent settings change to use only 2 workers (at bitminter), and "stop miner" start miner" all via the webgui has changed my 30.5-33Ghash spread to a steady 34-35Ghash at the pool. Would one be better?

I would like someone to write up a guide of backing up everything on the sd-card to a usb stick. I would do this myself if I knew how to, but sadly my linux skills are in the ballpark of none-existent.
Some points I'd like to see:

1. I would prefer if it did not require installing any additional programs.
2. The usb stick needs to be made bootable.
3. The guide should include info on how to modify the boot order between the SD card and USB-stick.

Hopefully someone is up to the task, Im sure this would come in handy for many users over time.

All those questions are discussed in many raspberry forums ...

http://www.raspberrypi.org/phpBB3/viewtopic.php?p=136912
http://elinux.org/RPi_Easy_SD_Card_Setup

you will find many scripts there which do just what you are looking for ...

:-)

dd if=/dev/sd?? of=/backup.img

Then copy the image to a usb stick, there is your backup  

Or in windows google "dd for windows"

To copy the backup to an sd card, reverse the if and of (input file, output file)

(edit: to locate where your SD-card is mounted, use "df")

there are several windows programs that can create .img files of drives or devices, and then later load the iomages to a different device or sd card. I did that with my most recent setting so that if the sd card needs repair it is much simpler then the last 2 times (no monitor/KB for the raspberry, so i had a vmware ubuntu on my laptop to sudo modify the card - PITA)

Update:

We've finally incorporated, so we're now officially know as BFSB Finland Ltd. Our VAT ID is FI25707336.

Bank details have changed also:

Account holder:	BFSB Finland Oy
Address:	Pedersåntie 215, 25700 Kimito, Finland
IBAN:	FI64 1638 3000 0110 33
BIC/SWIFT:	NDEAFIHH
Bank Name:	Nordea Bank Finland
Bank Address:	Aleksanterinkatu 36, 00020 NORDEA, Finland

Shipping schedule:
We've been working our asses off this week to deliver on the promise of shipping first october orders this week. It was a bit of a stretch (because of the capacitor issue, see below), but we managed to ship the first few orders today. We will proceed to ship more next week. 

Please don't send e-mails asking when your order will ship. We are a small team and this just distracts us and creates extra work and thus DELAYS shipping.

Hardware:
We have encountered overheating issues with the capacitors placed in 4 groups of 8 between the chips on H-cards. This shouldn't affect any orders shipped in august. We have not had any serious issues apart that the caps run extremely hot (up to 250°C). This is clearly a malfunction and we're not sure what is causing this. There shouldn't be a risk of fire as these are ceramic capacitors, but we decided to try removing them. (They boards seem to actually work better without these caps

We've processed about 160 cards ourselves (this is the cause of not shipping earlier), and rest will be taken to a company that will remove the caps (3.50€ a card, OUCH!). Future boards will not have these caps.

H-card availability
As some of you have noticed, we closed the october sales. We did this so that we would be able to deliver everything as promised. We will however reopen H-card sales, after we're done shipping so you can top-up your empty slots. They will be available for immediate delivery.

Software:
Chainminer has been updated. You can update by SSH into your pi, then

Then go onto web interface and stop-start your miner. We've had good results with this version even with autotuning on.

We encourage you to create a backup of your SD for easy fall back (it's a good idea to have one handy anyway, as SD cards are known to fail unexpectedly). You can of course recover old version also using git checkout.

We've been tuning bitfury fork of BFGMiner, and it seems to be working nicely. Mineforeman kindly offered to make us a test version of Minepeon with this, so hopefully sooner than later you will have a choice to run your miner on either platform.

Refund policy:
We have received some refunds and I want to clarify our refund policy. Refund in BTC is done using blockchain.info and using the price that it gives when refund is processed (I enter euro sum, and in shows number of BTC). Refund using bank transfer is also possible, but please understand it takes more time to process.

And someone said that you can't have to much overkill... Oh, well...

Congratulations on this and thank you for keeping to be the best bet in this race 

+1