I know Nick Boldt is a big mylyn fan and I am in principle too but just got bit by a few annoying bugs last time I tried it - but dont let that stop you
I dont have any particular recommendations on using Mylyn beyond what is on the homepage of Mylyn it self.
With respective to JBT and Mylyn then I know we could implement some mylyn specific hooks to make some of our views
more mylyn "aware" and I would like to see that happen in the next round (targeting Eclipse 3.6) where I also plan on
actually trying to use it more again.