Gabs reported Google has done a Sitelinks update. He is indeed correct. The first Sitelinks update was in February 2007 and then we had a new recent one where Google expanded them to 8 sitelinks per result.
Here is the new set of Sitelinks for the Search Engine Roundtable:
This is what they looked like on October 19, 2007:
So it does appear that some Sitelinks have been updated.
Forum discussion at the Search Engine Roundtable Forums.