Looks like it's a problem somewhere down the line after his ISP. Got this from Don, apparently from his server providers, apparently from another supplier. (BTW, didn't work for me, but I will keep trying.)
Tell them that the problem is temporary and will resolve itself within 24 hours, and that they should try the site again later. If they wish to try see it immediately, they can try the following instructions (based on operating system):
MAC INSTRUCTIONS:
Open the Terminal (its in /Applications/Utilities).
If you're running Tiger or below, type:
lookupd -flushcache
Or if you're running leopard, type:
dnscacheutil -flushcache
Then hit enter and close the terminal. Retry LARadio.com
WINDOWS INSTRUCTIONS:
Click start, run, and type NET STOP DNSCACHE
Then click OK. Retry LARadio.com.