37 Signals has the market cornered on simple, easy to use, “why didn’t I think of that” websites. Building upon their basecamp and backpack offerrings is a very simple to-do list application called TaDaList. Once again, it’s a simple ajax application that’s used to keep task lists. Utilizing an ajax library (such as my favorite Prototype) it makes organizing task lists simple. I’m still waiting for one to sync easily with a Palm. I really need to get an iPhone with internet access.