Rather than fill up the thread, here's some promo codes for Vegas hotels. Of these (and including the Luxor, which I don't have a good code for), Harrahs is the least dirty. I'm writing this as if you have no knowledge of Vegas hotels, if you do, well... then you do. Checked the codes today, they do come up on the various hotel websites.
Excalibur ($28): XFBOOK (closer to the good stuff on the strip than the Luxor)
Imperial Palace ($29): IIFNF (popular with students cause its cheap as fuck and very central)
Harrahs ($35): ILFNF Least dirty of this group. Good buffet and impersonators show. Central.