The Avogadro website is now operating under a new domain name:
All “old” URLs should be valid and redirect accordingly. The site is now also operating under the CloudFlare delivery network, so in principal, site access should be a bit faster, particularly for international users.
This is part of what I hope to be a very good 2014 for Avogadro. 
If you find problems, please let me know soon.
Cheers,
-Geoff