Senior Product Manager at Google, and the head of Picasa Mike Horowitz has left Google.
Mike Horowitz joined Google after a short stint at Applied Semantics in 2003, at lead the development of Picasa from what was originally a small acquisition for Google, into a top 3 internet photo property today.
During his reign over Picasa, Horowitz supervised and managed the launch of new features for Picasa Web Albums, including facial recognition, search, GData API, mobile viewer, slideshow widget, and geotagging, and expanded Picasa support into 38 languages.
Most recently he announced the launch of Picasa 3 late October, and it would appear that his departure may have been timed to coincide with the completion of the project
We're trying to find out where he's gone, and we'll update the post if we find out. He will be sorely missed, although despite a Google employee telling me in January that they were developing Picasa for Mac, I'm still waiting :-)