So, I don't have time to work on TaskSmash, but I think it has a lot of potential. Months ago I wrote a blog post offering accounts on it, and despite not linking to it since, there are more than 100 tasks posted every day. People really love it and email me about it all the time.
The PHP code is a bit of a mess. I was a really bad coder when I wrote it, so it's basically just one big disaster of a php file. It's all functional, just not organized or documented. So you'd probably want to clean that up. The big feature that needs to be implemented (that would seriously only take a day) would be to have recurring tasks. There's an API for it that I never made public, and someone is making an android app for it right now.
If this sounds like something you'd like to put time into, you can have 49% of it for $1. I'm keeping 51% not because I actually want to control it, but because I want to be able to look out for the best interest of the users on it, since they trusted me when they signed up. If you decide that you want to sell all the email addresses to a marketer, I need to be able to override that.