Depending on how well you do their test, you can get up to $50 in free starting capital for Power Poker (ignore the fact that the banner says $25, just do the test well).

Poker Space is the only site offering a poker sponsorship for Power Poker. You will have to pass their challenging quiz though, I recommend reading their course material first. Once you have joined the Poker Space community there are lots of exclusive freerolls and other events you can join in on.

I don't know how long the offer for Power Poker will stay valid, but they also have bankrolls for some other more common rooms !