Buzzed

(via Migrating from Flickr to Picasaweb | edparsons.com)

This was really helpful for migrating *all* my photos from Flickr (6 or 7 years worth) to Picasa Web, including metadata and album organization.  You have to have some chops on the command-line, particularly if your system isn’t already set up with Python, since there are multiple dependencies. But in my experience it is a superior, much more stable method compared to others out there.  The most popular one seems to be Windows/.NET-based Migratr.  All due respect to the developer of that app, but it simply kept failing mid-process and was in general a waste of time for me.  YMMV.