They wouldn't be comfortable in cities or populated areas, I'd think.
The only possible exception *might* be outside Exodar if you are a member of the tribe the draenei helped out.
The furbolg of Kalimdor are a bit closer with Nelves than the rest of the races, but I doubt they would travel to Teldrassil from the mainland, especially when Moonglade/the Felwood base are right there if they need to grab help from druids. The few furbolg on Teldrassil seem to have been corrupted from the infection that was previously effecting the tree.
Furbolg don't seem to travel far, so any from Northrend/etc would be unlikely to make an appearance on continents they aren't from. I'd suggest reading through the Winterspring/Felwood furbolg quest texts, and the Azshara ones for pre-cata, if you can find them. It can give you some insight into their attitude!
It's been stated many ties the furbolg have a very strong connection with nature, and as a result are very vulnerable to corruption when the areas they are in are afflicted by it.
And of course as always there is: http://www.wowpedia.org/Furbolg