Stories are circulating today about a possible Skype worm. There is clearly some sort of malicious code associated with Skype today, but it is by no means clear that it's a worm, and is not even clear that it works at this point.
From what we've seen so far, it seems more likely to be some sort of social engineering to trick a victim into installing something ... a sort of "OMG.... look at this!!!!" sort of thing. These tricks have been used with AIM and MSN for ages to install backdoor bots.
Again, there is no evidence to suggest that this is wormy or self propagating in any way, and may even turn out to be a directed attack, targeting a single victim. If you use Skype, relax and keep using it... just raise your caution level a smidgeon.