I have decided to cancel my account. I'm on the three month billing cycle, so my account will be active until 6/28/2011.
I haven't really enjoyed Cataclysm for a variety of reasons which have been covered by others in their posts. My main reason for sticking it out was the Three Rivers raiding group and a desire to finish the first tier of raid content.
P.S. A few statistics:
Start Date: 12/7/2004
Time Played on Zildjian as of 5/12/2011: 192 Days, 12 hours
Total money spent on subscription charges (not counting initial game and expansion purchases): $1,052.25