Hehe, yeah no personal attacks on you nor am I doubting your ability to research the roll a tank fills in group play.
Bottom line is we need more tanks and no one really wants to play as those any more. At least not until WotLK comes out mainly because Fury does so well in solo play and PvP, and this totally bums me out.
There are few things worse then trying to get geared to do end game play and not being able to run the standard faire instances to do so.
As a Warlock (wait for the sighs and disapproving head shakes...don't worry mages, even though you're finally getting that buff you've been crying about for the last two years, we're still going to be a more effiecent DPS class) the best gear to stack before hitting Kara and other end game raids (such as Serpent Shine Cavern, Zul Aman, Tempest Keep, blah blah blah) is the Oblivion set, the Dungeon three set specifically for Warlocks. Of course getting said set requires a minimum of four runs on four different instances (non-heroic mind you) and that would be if you're really, really, really, REALLY lucky and had the Robes and Shoulders both drop from Murmur in the Shadow Labs (I only had the robe drop but that's a good start).
Not only do you need to run Shadow Labs at least once (probably more like five to six times because you rarely see the drop you want on the first try) but you're also stuck running Shattered Halls numerous times, The Steamvault, and The Arcatraz, bearing in mind this is just to get you decently geared for Kara which is nice little bump into Tear 4 raiding gear.
But I digress, we need more tanks. Simple as that. Healers too. WotLK should help fixes some of this, everyone is going to want to play as a Death Knight and according to the beta testing and information Blizzard has released on the class it should be able to tank about as well as a Pally can right now. So that's good, and hopefully there will be an influx of tanks. I'm still worried we'll be short handed on healers though. There are few things worse then running and instance with a Druid or Shammy healer who ends up no being able to keep up because they aren't either specced or geared properly.
On a side note you should really check out group play, find a good guild or something. I used to be like that too but if you can find the right people group play is so much more fun and rewarding then grinding out solo quests. And don't worry about buying new weapons. Once you hit Outland you'll be re-geared so quickly you won't know what hit you.
Something else I can gripe about will be getting Tier 4 and 5 epics replaced by Green Starting Zone Quest Rewards in WotLK. Hehe.