I have two of these suckers (playing Beastlord) and a couple of Large Spiders ROck is one forget the other one. But, these Cave Bears are frickin awesome. They have this skilled called MAUL and they get to continuously strike at an opponent until they MISS (opponent dodges). Oh man I've seen these two things take down giants (ogres and elementals) with this skill. I got these puppies early in the game and have been just wiping the map with them. Of course I know when I run into a serious dodging unit they will be worthless but most of the stuff I've run into isn't seriously dodging. 
ANd these spiders omg they have serious HIT POINTS compared to most everything else I've seen. If only I could put ARMOR on them and RIDE them.
How about that Froggy? Spiders as MOUNTS? cmon please please please? ;
THey have them in RIFT the MMO game.