Just speculating here:-
It makes sense to me that intergalactic stars must be out there. We've seen images of lots of interacting galaxy pairs and even triples with large streamers of stars being flung considerable distances from the galaxies. Surely some of them continue out into intergalactic space?
Are we going to see them? Well not without the really big scopes and the HST, I would expect, given the challenge of seeing individual stars beyond our own galaxy.
Are there individual stars not too far from the Milky Way that could be seen? Don't know, but I don't think the Milky Way has had recent enough encounters with other galaxies to leave lost stars close enough to be observed? Give it a few billion years until we have our close encounter with M31, maybe?
OK, that said, I thought I should google "intergalactical stars" Lots of hits worth reading I would say!
HST has apparently identified 600 lost and lonely stars in part of the Virgo cluster.
Read this from 1997:-
http://hubblesite.org/newscenter/arc...eases/1997/02/