I've seen:
2011-02-13 03:21:33 Found Hash!
Sending to server: {"method":"getwork","params":["*censored*"],"id":1}
Server sent: {"result": true, "id": "1", "error": null}
About 5 times this hour... does that mean I found the winning hashes for 5 blocks?
eg: made the pool 5*50=250 bitcoins? :-O
No, that means you've found 5 shares. It's possible one of those could have been the hash that solved the block, but it's not likely. That means you'll be paid (Shares You've Submitted) / (Total # of Shares) percent of 50 BTC.
Example:
10000 Shares are contributed to the pool in a round, by everyone.
5 of those shares are yours (0.005%)
You receive 0.02 bitcoins as a payment when that block is confirmed.