Well I did 20+ miles (5 separate runs) in my VFF treksports last week and feel fine. I did 3 miles in my bikilas this lunchtime and picked up a blister on my R/H arch (where the seam is inside the shoes). I'm certain form is more important than speed and distance when transferring to VFFs so am building up gradually.
I intend to run the North Devon AONB marathon next June either barefoot or in VFF Treksports
You could try researching ChiRunning. Some of it is a bit strange but the basic running technique is very similar to barefoot running with shorter strides, increased cadence and altered posture. There's loads of stuff on the interweb!
I'm running in VFF TrekSports when off-road and VFF Bikilas when on road. My calves are taking a bit of pain but it's all under control and I'm considering the North Devon Marathon (June 2013) as my first real barefoot marathon!
I use Starva and many colleagues do too but we're down in Luton!
I have tried to look for runs on Strava while I'm away on business but not enough people are using it yet. It is building up though. Some are put off by having thier times, pace etc available for all to see but I think it's great. Four of us can do the same run at different times and compare details.
The more we talk about it the more people will use it. I'm in my fifties so not fast but I don't mind sharing my times. Even the disastrous Milton Keynes 1/2 marathon (2hr 10Mins) time went on Strava!
I have a pair of vff bikilas for roads and treksports for trails but have yet to do any long runs in them. That is because it is the Milton Keynes NSPCC 1/2 marathon tomorrow and I intend to adapt to the vffs after then.
Many people do ultras in vffs so it can be done but it is vital to gradually build up the mileage. Experienced runners find it hardest as they often have to hang on to traditional shoes while adapting.
I'm 54 so have no urge to keep my mileage up. I intend to forget my Brooks Adrenalines after tomorrow and just concentrate on gradually upping the distance in my vffs.
As for the 'stinky running shoe' problem, vffs come out of a 30 degree wash like new!