On the NWO Back in Black DVD why is Michael Buffer's voice edited out of the entrances in the matches in the extras section?

I would guess that WWE didn't want to pay residuals to Buffer for using his voice and likeness on the DVD.  Or, if Bret Hart was involved, maybe Buffer screwed up his name! 

Every so often I see Ricky Steamboat's name pop up on house show results, either working with Chris Jericho or Drew McIntyre.  Why is he wrestling and why not on TV?

The matches with Jericho were more a chance for the two to work together (which they both enjoy) and was mostly done on overseas shows, which allowed WWE to have one less wrestler on the tour, and Steamboat could be both a worker and an agent on them.  In the case of McIntyre, it was done to help him learn in front of a live crowd, but not a TV audience.  A lot of wrestlers could benefit from working some matches with Steamboat!  

I was watching a WWF RAW show on WWE 24/7 and as expected all WWF references were edited but when a wrestler or announcer said World Wrestling Federation the comments weren't edited. I thought all references to WWF had to be edited according to their lawsuit with the "other" WWF?

"WWF" is edited out, but "World Wrestling Federation" is allowed, although for some reason, I have seen clips were the bleep part of the word.

What did you think of WWE using Eddie Guerrero's name in the Batista-Mysterio storyline?

I think it was unnecessary.