[Thinlómien]

I actually didn't want start arguing on this topic... *sigh*

But, as many mentioned in LotR, Elves do have their own affairs and worries and they don't want to mix up with mortals' matters.

Gildor himself said he wouldn't like to counsel Frodo. If he wasn't ready to do that (though he actually did), why would he have been ready to escort Frodo on a journey that'd take weeks?

Even if Gildor would have thought it good idea to escort Frodo, his companions maybe wouldn't. (See the first point.)

Maybe the Elves were afraid also, and didn't want to set against the nazgûl.

The Elves were no free escort or guard service.

Last, and definitely not the least, the Elves didn't know about the Ring and so didn't understand the whole importance of the matter.