FlickrExport is a plugin for iPhoto and Aperture which provides a direct export feature for Flickr. Connected Flow have just released an update, now at FlickrExport 4 for iPhoto and Aperture. It offers support for multiple accounts, upload to multiple sets, choosing the license at upload and a new UI.
iPhoto: £12 (Upgrade: £6)
Aperture: £14 (Upgrade: £7)
Sales tax will be added at checkout for residents of the European Union and California.
Mac OS X 10.5 or later.
FlickrExport 3.0.2 required for 10.6.
iPhoto 4 or later.
Aperture 1.5.1 or later
To download go here