In reply to buzby:
Not aimed directly at you but all motorists should be able to perform some basic tasks on their vehicle when needed. Wheel nuts do seize on (as you know) but this can be prevented a lot of the time. Fast fit tyre places often wizz up the nuts with an impact gun and this can far exceed the reccomended torque limit of the nut. After visiting one of these places it can help to slacken off affected wheel nuts and retighten them youself, At least you know you'll have a chance of getting them off again. Wheel braces in modern cars are woefully poor these days and nowhere near long enough to provide the leverage you need, swap it for your own brace that you can pick up cheaply at a motor factors. Using the spare as a bumper weight on the end of a brace will often shock the nut into turning. Alloy wheels and steel hubs are often siezed together even with all nuts removed and there is a trick to free it if you are confident. If your alloy wheel has welded itself to the hub, put all nuts/bolts back on all the way in and just slacken them one turn, set off driving upto 5 mph then bang on the brakes, hard. The cars sudden loss of momentum should shock the wheel free.
Often see breakdown vans attending what looks like a flat/blowout more than ever these days but I think a lot of this has more to do with crappy tools provided in the wheel well, overtightned nuts from fast fit centres and alloy wheels now normal on a car rather than an exotic extra they once were.
Hope this helps!