I also think cloud is not exactly the priority here. And most importantly, if it ever happens,
please make it totally optional! TR is the ONLY GTD-like app I found out there that does not force us to have our data on their servers. Some of us cannot use such services at work. And some of us don't like to have our personal information online.
I think what is needed first is smart sync of different data files, like between computers on a network, or with the copy on dropbox. If that was achieved, it would effectively be like a cloud except users would control where the "cloud" is. Not to mention it removes the added resources and responsibility of data security from TR. (This was suggested here:
www.trgtd.com.au/index.php/tr-forum?func=view&catid=14&id=5505)