Yes, links from POD to FAQ's and the like are definitely useful. One limitation of POD is that the module author controls it. If you're looking for opinions on the merits of one module versus another, a discussion forum is invaluable.

Another problem is the overhead of keeping it up to date. If you just want to add a link, editing the POD, updating the Changes file, rolling up a new tarball and shipping it up to CPAN makes for a significant psychological barrier.