You can kind of 'save patches' already. Connect the TF to PC via USB A to B. If you take a SysEx dump of the Current Patch, you can save that SysEx data as a patch, and then reload it into the TF at a later date in any slot. (At least, I think this is how it works.) I've successfully used MidiOx on XP and Ubuntu to save patches.
One question though (sorry for hijacking the thread!) – how do you upload to the TF in a specific patch slot? There's no 'easy way' in the manual (compared to dumping patches).