I've been to 2 Super Bowls - San Diego/SF in '94 (Jan '95) and Seahags/Steelers in '06 (Feb '07). Both were corporate trips, fully paid for. I'd NEVER go on my own dime, not even to see the Cardinals. The costs are beyond astronomical, and the NFL controls EVERYTHING. In Detroit, when they went to find a steak house to host our Saturday dinner (for a total posse of about 60 people), one joint wanted $25k extra - on TOP of all OTHER charges, just because it was SB weekend! Funkdat. The game itself winds up being anti-climactic. We paid $4500 apiece for the Detroit tickets (40 yard line, spectacular seats). Can only imagine what similar seats would sell for in Santa Clara this year.
If you want to go, that's awesome - just be prepared to be separated from insane amounts of cash, everywhere you go.