While waiting for an app to come out for n900 making the sms/mms! menu something worthy of the phone, I'm sending the texts I'd usually save as drafts to a random number (one which won't accept sms). This way, I have them showing in my conversations menu and opening them there lets you ctrl-c and then cntrl-v into a new text. Saving drafts to different fony numbers putting them into 'draft categories' is also an idea.