I'm solo mining, and only one port ever seem to work, and no matter what port I change it to, Cudaminer still tries looking for the same port.

It's still the same with the exception that you have to configre the wallet to which port to use:

C:\Users\<username>\AppData\Roaming\blablacoin\blablacoin.conf

rpcport=8998


and start cudaMiner with

-o http://127.0.0.1:8998

I was able to solo-mine two consecutive blocks for Yacoin twice this morning, hehe. Once around 06:15, and once around 08:28 ...

Thanks Christian for your generosity. A forum lurker mostly. Just wanted to thank you for your work and effort. 1LTC in as requested, hope more will come your way (217fdc8b8d4071d04344eef7fea90a6150487a244783884009e8e5111121e7a2)

also, usually I modify the autotune to limit the search space via something like (GRID_BLOCKS *WARPS_PER_BLOCK LOOKUP_GAP < 50) continue; really speeds up the search by ignoring the really slow low warp counts, but not sure if I'm missing something?

Experience with the Y and Z kernels also indicate there's about a 10-15% gain on my cards.

Double check the block explorer - there are no two hour gaps between consecutive blocks in the last 12 hours.  What block numbers were they?

RIF - Reading is fundamental... thanks 

Nice work on the new Kernels. I'm able to squeeze 280 k/hash out my 660ti with stock clocks.
Edit: Kind of curious if implementing a backup pool feature is possible in the future?

The 450 is only on the b114 unofficial build, on the latest official build I am averaging 550 (although I have seen it peak once at 600 I think).
It is actually a factory overclocked card, specifically a:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125489

Core clock: 1020 mhz
Boost clock: 1085 mhz
memory: 7000 mhz

Looking at the spreadsheet again, people are getting between 650 and 600 kh/s at my clock range, so it was my fault for not paying attention to the OC level.
The extra 50 kh/s is probably due to it rendering windows because its my main GPU and not a headless mining machine.

PS. I should like to point that my main point was that switching to the new b114 caused a significant hash reduction.
Luckily I was being pessimistic ahead of time and only ordered one card to test it out before committing to a large mining investment.

PPS. Something interesting happened, the GPU crashed (and so did firefox). After which cudaminer went from mining at 550 kh/s to 5500kh/s
or at least so it said. It didn't manage to submit any results. I will keep an eye on it

Difficulty is also dropping as some miners seem to be searching for alternatives. Meaning that you can expect more YAC per day with the same hardware.

Out of curiosity: what hardware did you select for optimal YAC mining? In my opinion, GTX 660Ti cards are pretty solid scrypt-jane miners at a good price/performance point.