If anyone is looking for another cheap way to build a 28mm goblin horde, Reaper minis now has a bones version of their old goblins at $3.99 US for 6 of them. (3 sculpts, 2 archers, two with spiked clubs and shields, and two with spears and shields). They are a bit soft but they look pretty cool.
And of course I'm sure that you guys already know about the lumpy Hobbit GW goblins and the sharp looking Moria GW Goblins from FoTR. And the 1/72 Caesar plastic goblins and orcs. And the EM-4's plastic orcs.
I think you can get a bunch of those plastic Gnoblar (the ogre) goblins in a box from GW too.
I kind of wish I could build multiple goblin and orc armies from different manufacturers and pass them off as different breeds and types or whatever. Then I could write some "my goblins can beat up your goblins" type campaign rules.