A couple of other options:
At the Fall Gathering I got to use tee's Maverick PT-100 Instant read thermometer. I was pretty impressed with it. Having owned a Maverick ET-732 and knowing how well it has performed & held up for more than two years, I would not be afraid to buy one of the PT-100's.
Earlier this year I got a DeltaTrak instant Read thermometer (about $20) and it has thus far performed flawlessly. It got very good reviews, it's waterproof, has the narrow end probe (like the premium units), guaranteed accurate to within 1°, response time is less than 5 seconds, can be calibrated in the field, and is NSF approved!
William Sonoma recently came out with an iGrill alternate called the "WS Smart thermometer" which also has WiFi capability and an iPhone/iPad app.