Get on over to RideAsia.net and have a look at all the info they have. I found it extremely useful for accommodation, places to eat and of course reading other ride reports gives you some idea of places to visit etc.
I was there for nearly 3 months, a lot of it in V waiting on parts, it is a crap hole so try and stay a way
Phonsavon is a definite must visit place, the town itself is not much but it is central to a lot of activities.
Grab a GPS map from Don Duval in V, he lives at the Villa Lao Traditional House N17.97164 E102.59623
He actually rides ALL the roads, dirt and mud and makes the maps himself, plus heaps of way points, especially to do with the Ho Chi Min trail.
Of course, for a tourist perspective I can recommend my own blog page, look for the dates from 2 Nov 2012 - 7th Jan 2013