Mining Transaction?

[Electricbees]

This morning, I found a mined transaction in my Bitcoin Client stating that I mined ~.7 coins.
Does anyone have any insight as to why I would have this? Correct me if I'm wrong, but doesn't mining always generate 50 coins (as of now) and weird chunks like that are usually processed by a pool operator and therefore, would be received, not mined?

[DeathAndTaxes]

Did you ever mine on p2pool or Eligus?  Both include members in the coinbase.

[Electricbees]

Did you ever mine on p2pool or Eligus?  Both include members in the coinbase.

I have GPUmax pointed at Eligius... I kind of figured that was it, but spent more time than I thought necessary looking for the answer and came up empty handed. Thanks for the clarification.