A WebmasterWorld thread is asking if anyone noticed a Bing Search update over the weekend.
There are only two posts, but for Bing, that can mean a sign of an update.
One SEO asked:
I am seeing different results for the last week. The results are substantially different. Overall traffic is about the same. But rankings are all over the place.
Has anyone else noticed a change in their Bing traffic over the weekend?
Forum discussion at WebmasterWorld.

Comments:
Stretford End
04/04/2011 03:08 pm
I put this blog together last month for the UK: http://www.intelligentpositioning.com/blog/2011/03/bing-algorithm-update-uk-march-2011/ Haven't noticed anything of significance since....
Andy Francos
04/04/2011 03:15 pm
I put this blog together last month for the UK: http://www.intelligentpositioning.com/blog/2011/03/bing-algorithm-update-uk-march-2011/ Haven't noticed anything of significance since....
Rick Hardman
04/27/2011 09:48 pm
absolutely I have noticed ranking changes over the last 2 weeks or so. Looking for more info on it and if anyone has insight into this. #Bing #seo
Los Angeles SEO
06/03/2012 06:42 pm
Haven't noticed anything of significance since....