Same here. I am using Launchy to Twitter my tasks to RTM which is relly neat. But, is there some syntax to say which list I want to add the item to? And perhaps a way to tag tasks as well?

Any help would be much appreciated.

It's not currently possible to specify lists and tags via Twitter, sorry! We are looking at supporting additional task properties when adding via methods such as Twitter, though.

This would be a MOST welcome feature. There are similar services out there that allow this and that is getting to be a killer aspect of my adoption to the service.