Not exactly an answer to your question, but we started keeping track of every funding source that we'd heard of or have contact to in our intranet wiki. After a couple months of just keeping your ears open and taking notes you end up with a pretty long list.

That said, just repeating our list wouldn't do you a lot of good; usually you're looking for people that are either in your area or that you have at least some distant connection to. Think you don't have connections? Yeah, so did we. Then we started paying closer attention over a period of time and realized we had quite a few.

I'm sure the biggest source of seed-stage funding is still individual angels.

CRV Quickstart

Lightspeed Summer Grants

IW AlphaLab

Also the Plug and Play Tech Center, they are the only true incubator around.

any good ones in Dallas? I've heard of StarTech, but they seem a little different than these type of seed funds.