I have herd that in the Beta of the new Giantbomb the quests have been removed, No being apart of the beta myself i ask you if this is true and if so why? This was one of the best parts of the site :(
No they weren't, the quests were just an amusing gimmick for like the first couple of weeks. Plus that would clutter up the forums with all of the idiots who kept posting their quest-related spam-blogs. And it also encouraged a lot of users to go around recommending and/or following fucking everything and everyone on the site.
What is a shame, though, is that I believe the wiki tasks thing is being discontinued.