Thanks for setting up such a fast, stable pool Eleuthria. btcGuild is a pleasure to use, and very profitable!

I've been with you since ~50GH, enjoying watching our pool grow and develop.
Suggestions:
1) Add a Hall of Fame for top donors. I've been very unlucky with solves and would like another chance at recognition.
2) Add a Hall of Fame for most dependable workers, for the same reason as above.
3) Award dividends and prizes for those placing in any of these categories, to encourage loyalty.
4) Strongly discourage pool hopping, either with a share decay rate, or the (harsh) bright line of puddinpop's proposed "contributed" distribution method" described here:
Puddinpop's pool software allows the server to choose between "connected" and "contributed" distribution methods. In contributed mode, it behaves somewhat like slush's pool: every hash you calculate is counted, and the block reward is split among everyone according to how many hashes they calculated. In connected mode, the block reward is spit among currently-connected nodes only, according to the hash/s that they were contributing at the time.
I wish puddinpop's server would become popular again. It's open-source and built in such a way that miners can actually see what the server is doing on the network side (you download the full temporary block). Unfortunately, running the server is CPU-intensive, and probably it could not sustain the number of miners that slush's pool has now.
5) Add NameCoin (namecoin.btcguild.com:9098) support and a free members-only NameCoin<->BitCoin exchange.
I'm sure you are already very busy, so I'd be happy to throw down and invest some of my own BTC if that would help git 'er done.
Now that the basic services are stabilized and robust, let's keep btcGuild light years ahead of the competition!