FlickrExport 3 Public Beta
FlickrExport is my favorite iPhoto plugin (and it would be my favorite Aperture plugin too, if I used Aperture), though I will admit that it is the only iPhoto plugin I use. Developer Fraser Speirs has been dropping hints for awhile about the next version of FlickrExport, and now it is available... in beta form that is.
New to FlickrExport 3 are:
A big focus on groups. You can add pictures to multiple groups, create 'group actions,' and it even displays the group rules (i.e. it will tell you if there is a limit to the number of pictures you can upload per day, if the group is moderated, and so on.)
Auto-completion of tags (which are downloaded from Flickr)
A much better way to upload photosets, allowing you to organize the pictures in the sets before they are uploaded
Geotaging, with the ability to create presets, as well as fetch latitude and longitude from Google Earth
Check out the screencast at the FlickrExport 3 beta website to get the skinny on all the new features.
The FlickrExport 3 beta is available for both Aperture 2 and iPhoto. Keep in mind that when FlickrExport 3 leaves beta it won't be freeware, though pricing isn't set as of yet.