Dammit... I really like TheHitList. But since it has no possiblity to sync with toodledo I can't use it.
I actually was an avid Toodledo user as well. I find though that the interface is a double edged sword. The reason I chose toodledo was for the sheer amount of possibilities it provides. I even payed for a pro account for a few extra features.
With Toodledo you really can organize your to-do's so many different ways. Which is the same reason that I now think I'm moving away from Toodledo. While I still think it's a great service and think the devs are really responsive, I just feel overwhelmed with Toodledo. I've tried a few different organization methods and it took me a while to settle on one that worked. Then after that I guess I just find it takes me way too long enter my tasks into toodledo. I take advantage of using twitter to add tasks in a "sentence" like format, but sometimes it doesn't assign the contexts reliably. At any rate, I tend to rely on the website directly more often then not and the UI isn't the cleanest interface. Chocked full of options yes, but quickly entering a task, not necessarily.
I always shirked away from fully mac options as I work on a PC at work but figured I'd give The Hit List a spin, and I ended up really being won over. I'm a quicksilver junkie, so the sentence like input (auto tag with /, auto-context with @) and keyboard shortcuts really make it. On top of that, I'm a sucker for a well done Mac UI. I find that THL has just enough options to satisfy me but not so much that I'm overwhelmed. And on top of all that, it's so nice to just be able to highlight 10 tasks and drag them to a folder or tag and it's sorted in an instant (rather than changing them one by one or having to use a search function to batch change them).
To end my rant, I still appreciate Toodledo completely and I'd love to see integration between the two. Currently I'm using logmein while at work to access THL on my mac at home, so a web solution would be very welcome. But I'm really pleased with THL.
MacBook Pro 15' Unibody