Stewart Butterfield (left), Cal Henderson (right)

Many engineers from Flickr have been laid off as part of a massive lay-off that took place at Yahoo! yesterday.  Flickr Chief Architect Cal Henderson and Co-founder Stewart Butterfield are now rumored to be parterning on a new start-up.

Butterfield resigned from Yahoo! in June 2008 and Henderson left yesterday.  The new start-up is expected to revolve around social gaming according to Kara Swisher.  Yahoo! purchased Flickr for $35 million in March 2005.  Caterina Fake, wife of Butterfield and another co-founder in Flickr joined a start-up called Hunch as the chief product officer.