My thoughts on Super Tuesday:
1. After all the delegates are allocated in California, McCain will have well over 700 delegates; he won all but two of the counties (lost by a hair to Romney in Fresno and Shasta), so he should get all 173 delegates. In order to secure the nomination, he'll need about half of the remaining 1,035 delegates, an unlikely feat.
2. As a result of the delegate reality for McCain, he will take Huckabee onto his ticket at a brokered convention that turns out to be little more than a formality. As the delegate count currently stands, McCain-Huckabee needs less than 300 delegates out of the remaining 1,035 to secure the nomination, less than 30%. I cannot envision any scenario where Paul and Romeny score enough delegates over the rest of the primaries to prevent a McCain-Huckabee majority.
3. If Huckabee has not already agreed to accept McCain's VP slot, he will do so in a heartbeat. First, I have read repeatedly that McCain has made a private pledge to serve only one term, giving Huckabee a cleared field for 2012 if McHuckabee wins in November. If McHuckabee loses (which it probably will), Huckabee is "alive" for 2012, just like Edwards was for 2008 despite being out of office; Huckabee can go around the counrty for four years, extolling the virtues of the FairTax (during a severe recession, no less) and building grassroots support for a 2012 run.
4. Many conservatives will absolutely revolt over a McCain-Huckabee ticket, and will sit out the general or become suicide voters" and pull the lever for the democrat. This conservative angst, however, provides an excellent opening for a true conservative in the Goldwater-Taft mold to lead the exodus out of the party -- Ron Paul. And if Hillary, who most democrats see as generally pro-war, is the democratic nominee, many of them will throw their lots in with the disgruntled conservatives and support Paul. Under such a scenario, Paul should have enough support get into the debates and take home a sizable chunk of the vote in Nobember. If Bloomberg jumps in and slices off the nanny state vote, probably split 60-40 to Hillary over McCain, Paul may even have a chance at winning. At this point, there aren't many other options left.