Flickr have just launched code.flickr,
Your one-stop shop for information, gossip and discussion with the Flickr developer community which I imagine they want to use to draw together the disparate developer resources from the groups, forums, mailing list and more.
The new Uploadr does seem better than the 2.x version, and has some nice features, but none of them seem hugely critical. Last time I used it, it was unreliable, slightly slow and I read a lot of bad press so I reverted to version 2.x (I’ve just reinstalled v3 and I will give it another go).
But, it’s in XUL. I don’t like XUL. I started writing some crappy XUL applications at the beginning of the century, and it was *hard* (it didn’t help that the documentation was both partial and obscure). From what I understand, the situation has improved, but not to the extent where there’s an XUL development ecosystem outside of Mozilla extensions (covered in season 5 episode 1 of LugRadio).
If cross-platform was an absolute goal, and Adobe Air is out of the picture, and bearing my current pastime in mind, it would have seemed more appropriate to choose wxWidgets or, for a web company like Flickr, one of the other language implementations like wxRuby or wxPython.
In summary: XUL, bah.