Andy, There's a bunch of us from the Tampa Bay area going down. Our hotel is the Embassy Suites at the Miami Airport. It is a great value at about $64 on hotwire.com... look for the Customer Favorite, Miami Intl Airport MIA, 3.5 star hotel. As for a South Beach hotel? I think that many were put off by the slum like nature of some of the hotel's there... (can you say 'Henry Hotel' from the Arg game?) Of course you might find some DC United fans there in those over priced slum hotels of South Beach. No real plans for post game... yet. See ya there....
Andy, you can read my usual evangelism at http://www.sams-army.com/. The deal at the airport does not sound too bad. It isn't as much fun as South Beach but the price is right!
Stay at the Delano, party at the Clevalander, leave happy. The only complaints you'll have will be from the whiplash from scopin' all the hotties at these two places. And, you can get up early if you want - or not sleep - and head over to SportCafe to watch footie from Europe. And, of course, have a meal Joe's Stone Crab. You'll spend some bills, but it's well worth it for a fun weekend.
Andy, Just checked... it is $69. Look for the secret code under the amenities icon... Ref No. 606408918