Looks like my next trip to Vegas will be on Feb 2nd, Is it going to be really busy as I have just found out the superbowl is on too?
Superbowl's in Glendale, Arizona (just outside Phoenix), so not exactly close. That said, since there are more rental cars in Vegas than Tucson, Vegas will be the alternate-airport-of-choice for many bowl-bound travelers. Tucson's airport is, well, lousy at best compared to Vegas.
You'd better have your Vegas rooms booked, as well - there aren't many good hotels around the Superbowl site, and many of the Scottsdale hotels will already be full with winter travelers and those planning on attending the Scottsdale Arabian Show, the largest Arabian horse show in the world. I know for a fact that some people are planning on driving the road from Vegas to Glendale (more fool they - the road's been improved, but it will be gridlock from 4 AM on). If you plan on driving anywhere southward in Nevada on Bowl day, stay off the interstates. Want to sightsee outside the city on that day? Don't.
Make your rental car (if you intend to hire one, that is) reservation as far in advance as you can - it may already be too late for certain size classes with many of the regular companies.
Otherwise, if you're planning on just Strip cruising, the most action you'll see is around every screen showing the game, and the places catering to those who wagered on the game.