I built nift.ie a while back if you want to check it out - it's incomplete and I think it only has one regular user, me! - but I find it very useful for myself, which makes it worth building :D - actually I couldn't function without it ...
Great job man, looks good and works quite smoothly, only wish it had a countdown option for sub tasks. I find that having a time limit motivates me to get started right away and stay focused to finish before time runs out. Maybe even have a points system to turn it into a personal game. Overall Nift.ie works great though, you should post this and show it to HN. I'm sure they can give you even more valuable feedback.
Anyway, right now my focus has changed - I'm launching a new service, my second, and the whole reason I got into web development in the first place ...