As far as I know, you are even faster than Slush, but he takes less than 3%. Are your servers costing that much to run?
There is more to it than servers, for 14months we have lived on donations and volunteers, I would also like to be able to reward and encourage the code crew - the ones that do the work
I will also need to spend time with an accountant soon and possibly a lawyer.
We considered quite a few things in coming to this decision, among them were
1: Bitcoin is volatile, today's $10 (or is it $11) could be next weeks $5
2: luck will play a part in what 3% actually is - 3% of a 6block day (yep we had one recently) is very different to a day of our expected 18ish blocks
3: what the hashrate is likely to be once fees introduced
I really didn't look at other pools costs, but what was required to ensure Ozcoins future as a premium Bitcoin Mining Pool.
Hope that helps,
Graet
edit: and -sorry slush-, but his pool is still hoppable - there is a hidden fee for his fulltime miners