What has happened to the website www.postyourselfnaked.com ?

2physician,
As you have some time on your hands (so to speak) you may be
interested in the following article:
http://www.fastcompany.com/magazine/85/mystery.html

As a error message or the relevant network logo isn?t appearing
(http://www.webair.com ) I have researched the owners of the domain
name here:
http://www.networksolutions.com/en_US/whois/results.jhtml;jsessionid=ALU2URQB3NWEMCWKEAQCFEY?whoistoken=0&_requestid=2986786

So that puts you in the position of contacting the webmaster directly. 

Other possible reasons why the website has disappeared (besides
webmasters being sick of it and/or not paying their bills) is related
to content (blocking can occur domestically or internationally) or the
site is simply being updated.

As selecting the site gives no indication (just a dead line) I wonder
if it has been a while since you last visited it? If yes, it would
correlate with search made of archival web pages
(http://www.archive.org/web/web.php manually type
www.postyourselfnaked.com) showing no updates taken since February of
last year. If no, the site is most likely being updated.

Kind regards,
gfmaster