Now, I don't know if he's anywhere close to an actual possibility, because I can see McCain getting skittish and being talked into taking on Romney, but Jindal does seem to have a lot going for him (read the OpEd piece linked above for details). The GOP needs someone on the ticket they can get excited about, and it doesn't look like that someone is going to be McCain. Sorry, John.
I hate to say it, but I think with the focus these days on identity politics, it would do McCain a lot of good to pick a running mate who is not a white male. I hate saying that because in my opinion a politician's philosophy and values is a thousand times more important than whatever gender or ethnicity they might be, but I think I'm in the minority there. I've seen plenty of people on livejournal, for example, admit that they're supporting Hillary primarily because she's a woman.
I'm a woman, and that simply does not compute.