Flickr.com has been a hub for most of the new generation photographers. With unlimited storage and unlimited sets in the Flickr Pro Account type @ $24/year, it is the best in terms of space and photo archiving services.
Flickr has released all new version of its Uploadr: 
Flickr Uploadr 3.0 is compatible with both Windows and Mac. Following are the direct download links:
For Windows: FlickrUploadr-3.0b2.exe
For Mac: FlickrUploadr-3.0b2.dmg
Discussion on Flickr Forums
[...] Check it out! While looking through the blogosphere we stumbled on an interesting post today.Here’s a quick excerpt… the best in terms of space and photo archiving services. Flickr has released all new version of its Uploadr: Flickr Uploadr v3.0. Flickr Uploadr 3.0 is compatible with both Windows and Mac. Following are the direct download links: … [...]
The Flickr uploader is pretty sweet )