If you're in Vegas for MIX08 I highly recommend the helicopter tour of the Las Vegas strip at night.
USD75 (plus tax) gets you not just an awesome 15 minute flight, but also a glass of champagne and pickup/return from The Venetian (or any other hotels on the strip)
Bargain!
Alas, I did the trip to try and get some footage for a title sequence for my MIX08 video podcasts - and from that point of view it was a disaster. You don't get to choose where you sit in the helicopter. Two seats in the front next to the pilot get excellent views, but alas I was allocated the second row in the back which meant constant heads and other cameras in the way. Plus my shoulder-mounted camera was too big to really move (and I hadn't done my research in working out which hotel was actually The Venetian when seen from the air).
So a bit of a disaster from that point of view (scoff at the footage here:
http://www.vimeo.com/751514 - but I recommend you click on the HD icon to turn it on, otherwise it looks like a REALLY BAD YouTube effort). Nevertheless well worth going on when you're in Vegas.