Super is the only freeware converter which works real good.
But I've to agree with ChotoCheeta regd Xilisoft.
Although it is a real good converter.. Super hangs up sometimes while converting(maybe with disrupted/corrupted media files), but Xilisoft rox... it rarely hangs up during conversion(never happened to me), is real fast & vastly configurable... paidware though
I found it extremely useful for video conversions to my N95 8GB.
For more converters, TMPGEnc is good & also WinAVI (the fastest in the business)
BTW... I've a doubt of my own.. any all-media(esp vob, mp4, wmv, rm...) converter which could edit any file too...
(dont gimme names like Ulead, TMPGEnc... i tried them all... dont support editing(cut/paste) some files.. I want an all-in-one utility)