I don't think Wayne Swann is fit to be PM (but then again, I think the same thing about Tony Abbott and he may well be PM-elect by the end of the next couple of weeks).
I think this was a difficult election in terms of capturing national sentiment, because there wasn't one. The swings towards and against Labor were all over the place, it seemed to depend mostly on local issues, because people as sure as hell were not engaged by talk at a national level. The commentators were at least suggesting that the election would be really difficult to call because there was a real diversity in views. I would suggest though that the major swing towards the Greens (really, it was astounding) in most electorates might suggest that people are beginning to look at other options because the two-party system isn't doing it for them anymore. That's not to say people aren't sick of labour, but the liberal party hasn't exactly won either.
I think it is also misleading to suggest that 17 seats is a huge shift towards liberal when all of them were extraordinarily marginal to begin with and the difference could well be attributed to the rezoning of many seats. Additionally, the swing against labour in the primary vote was not at all matched by the swing towards the liberal party - the swing to the liberal party was relatively small (+1.

, it was other parties that managed to gain substantially on the primary votes.