For a limited time 1&1 is having a 25% off sale on new .org and .mobi domain name registrations. Regularly priced at $6.99, you can get a new .org domain name for $5.25. This of course includes private domain registration.

Also on sale are the .mobi domain names. Normally $19.99 per year, you can get register your .mobi name for only $9.99. The .mobi name is the only recognized top level domain for the mobile internet. It's definitely the domain you want to consider if you're developing web sites for the smart phone platform.

Be sure to check for availability of specific domain names here: 1&1 Domain Name Availability Tool.