no worry, not every one know how to attack 51%
so don't worry to much.

The most important current is that a proof of stake, even 0.1 coin will cause 100 blocks chain to be invalid.

seems every proof of stake will make some proof of work to be invalid.

i also have another YAC pool running , http://yac2.ltcoin.net  in another sever.

I notice with this pool every time it finds a block the displayed hashrates dip down really low for a few minutes, every time.

That's incorrect. Only chain trust score or chain work matters. Clients will always switch to chain with highest trust score (ppc, nvc, ...) or highest work (pow-based systems).

Ok, good job, carry on 

my wallet just started saying checkpoint too old. Any ideas?

wallet version:
v0.4.0.0-g32a928e-beta

guess this is the newest, cant see much info?

Cheers

YAC has seen a bit of activity recently. The casino I have linked in my signature and also I just saw earlier that coingas.com and cryptosextoys.com is also now accepting YAC thanks to user fendlestick. I think when more stores and sites start adopting YAC the word will spread even more.

Other than that, the only way I see to spread awareness is to get some things that have been discussed in this thread done: mainly a user-friendly installer that is kept up-to-date with the latest builds for Windows bundled with a miner that has an easy-to-use interface. This would bring a lot of "non-geek" users to the table I think, if there was the prospect of mining coins in an easy-to-setup package. If I had the skills to do it, I'd help but unfortunately I don't so I will have to leave it up to someone else, but I think that is what YAC needs the most at this point.

latest windows binaries?

That would be a cool feature for all coins to implement. The problem would be determining what everyone should update to - the only way (since centralization is not an option) to do something like that that I can think of is a P2P consensus on what is the newest client.

Very good point