After trying a few URIs I have gathered that Google seems to be working on Picasaweb for Google.

Look at the following 404 page:
http://picasaweb.google.com/a/google.com/

then compare it to the normal 404 page:
http://picasaweb.google.com/thisisanexample/example.com/

I think everything will come to Google Apps eventually. Blogger, Groups, Picasa, Webmaster Tools, FeedBurner, Analytics etc.

That's a normal 404 for folders with just one letter in a name, "a" isn't in any way special. Compare:

http://picasaweb.google.com/p

http://picasaweb.google.com/k/whatever

I hope they bring it to Google Apps but first of all I hope they integrate it with the explorer interface of Google Docs.

Could be handy to access all from one place...

And I hope, they will update the gmail design to match with the explorer interface of docs.google.com ^^

cheers from Vienna,
Peter

I have Google Apps for my own domain but can't wait to have all the services that google account comes with. For example, can't add tabs to my personalized starter page like iGoogle allows. No photos, toolbar support, etc.