here's what someone posted over on Larry's site:
Looks like the domain name registration either expired and Natex intentionally or unintentionally didn't renew it, or the domain name has been hijacked (through Bulkregister by a company in India it appears). If you really need to get some of the PDF files, they're still visible on the Natex server at
www.sheetmusicarchive.org *IF* you set your DNS lookup to use the Natex servers (at 65.192.75.3 and 65.192.75.5). If you don't know how to do this, go to
http://www.opennic.unrated.net/personal.html for a quick explanation. If this is still all very confusing, email the owners of the Sheet Music Archive at sma@natex.com to ask them about getting the Sheet Music Archive back up.
It's all geek to me