I just sent mail to the domain you specified for those two email addresses.
Reply to either one.
I know our email system is working overall...as others have registered recently.
The first you tried was Oct 1 2007, the second was Nov 12 2007.
There is a possibility it doesn't like your email domain, Megiddo might be able to dig a bit deeper into the system and find out.
[edit] Also, some mail systems see the activation email as spam, check your spam folders.
[edit2] Removed email aliases at user request.