SCREAM! I've just looked and mine have gone too :-( I'll miss them, I don't think they ever actually showed up in the search pages, but I'd grown fond of them. They were like little sitelink pets :-(
Yeah its done the same for me aswell for all my sites that had them, I assume they have simpley been working on the system and as it automatically picks them from the content on the site they will just come back when the site gets crawled enough again since the changes which made me lose them. No big worry for me they made very little to no difference at all anyways.
Links, indexed pages are still the same, so I don't think Google is punishing any web site when removing sitelinks. One possible explanation is these web sites don't have enough SERP power to be an authority web site as far as Google is concerned .
All five of mine are gone from sig site below. Also went from a pr4 to ZERO on that site. Still getting SE traffic though. Also, Googlebot has been hitting my site more and more lately. Skillpedia...just noticed when I posted this we both have 570 posts.
camp185 If I were you I transform bestwebimage into some kind of flickr where users upload, sell, buy and search for web images and bestwebimage is the perfect domain name for that ! Just an idea
Same here - mine have gone from webmaster tools, but they still show in the SERP's I think it is a glitch in webmaster tools
Just logged in to find whether the number of sitelinks increased for my site. It is shocking! Nothing was there. As google says "sitelinks are dynamic pages created by google"; hope it will soon create some sitelinks for my site
Update: My sitelinks are back in Webmaster Tools today. They had disappeared for 2 days (but remained in the SERP's)