Thanks to Kent I found this cool little InfoPath add in for writing .Text entries, I'm testing it right now. Hopefully this will help me blog a little more as I find writing blog entries straight into .text frustrating and every time I write them in word or notepad I end up debugging the HTML by hand afterwards!
Hopefully this will also help my spelling as InfoPath integrates the office speller. Now if I can just find a way of adding links without having to do edit source I'll be very happy indeed.
Update: Edit Source does appear to be the only way to do this, hmmm time to play with the InfoPath Object model methinks