I think the oid issue only bites if you have something dependent on oids remaining unchanged. As a (very) small data-point, I've moved databases between installations successfully and had no problems. I am, however, fortunate enough to have come across PostgreSQL around the time that the developers started talking about deprecating oids at some point (v7.2 onwards, I think), so I've just avoided them from the outset.

And having just re-read the last paragraph, I think the phrase "Just my 2 cents worth" would probably be overstating it ;-)