Blizzard Blue poster Nethaera has posted a feedback thread focused on tank cooldowns on the official World of Warcraft forums.
To clear things up, Blizzard isn't interested in balance feedback I.E. "who is overpowered?", they simply want feedback on what players feel are fun abilities, the sweet spot for ability cooldowns, and the roles of talents and glyphs.
Also, oddly enough, Blizzard wants to know if there are any cooldowns in The Burning Crusade or Vanilla WoW that you miss in Wrath of the Lich King.
The feedback gathered will be used to aid the development team in designing talents and abilities in Cataclysm, though nothing suggested in the thread is guaranteed to be used.
If you've got an opinion on the matter, and you want your voice heard, head on over here to let Blizzard know your thoughts!
[Thanks Kost for the tip!]