After experimenting with both for about a month, I’ve officially decided to drop Tumblr in favor of Buzz.  Tumblr’s a terrific service with an amazing team behind it—this isn’t a “goodbye cruel world” sort of post.  But my social network and my conversations have grown much more quickly on Buzz and I need to consolidate my digital life a bit, so it makes sense to spend more time there and less here.  If you’d like to follow me over on Buzz, my profile is at this link.