Well, we're crowd funding an open source email client. Maybe it's not how these things have been done in the past but I'm happy to pay in advance to get someone to else to do most of the build. I can hack on it once it's more mature and stable.

If you have a SaaS app that's not open source and you're making money off then it's probably not going to be so successful in the crowd-funding arena - but you're still welcome to try.