MACUPDATE ADMIN  Just checked the download and the developer's site, accessed both instantly here, in Mexico.  
(Version 3.0b3)

MACUPDATE ADMIN  Try this... Open Terminal and type (at the prompt):

lookupd -flushcache

then try to access download/dev site  
(Version 3.0b3)

TED L. NANCY  Obviously it's a problem on my end (here in Birmingham, AL).

I opening up Terminal and typed: lookupd -flushcache

Returned the following: -bash: lookupd: command not found

Still can't access...  
(Version 3.0b3)

MACUPDATE ADMIN  I'd call up my internet service provider and complain to them, might be they need to update their DNS server(s).

And, don't know why the lookupd command did not work for you, works here (I use it often) on an MBP C2D running 10.4.11  
(Version 3.0b3)

TED L. NANCY  Appreciate the help. kproxy.com proved that the site is there... but kproxy won't let me download the file (because its too large).

It might be my modem/router setup. Been having some headaches lately.

Thanks again.  
(Version 3.0b3)