2011 Dec 23.
Some on Slashdot just asked about virtual web site hosting stuff.
Here is the list from about an hours worth of responses:
<p><a href=http://hostgator.com/>HostGator</a>
<a href=http://www.linode.com/>Linode Cloud</a>
<a href=http://www.slicehost.com/>Rackspace Hosting</a>
<a href=http://hub.org/>Hub.org</a>
<a href=http://www.a2hosting.com/>A2 Hosting</a>
<a href=http://arpnetworks.com/>ARP NETWORKS</a>
<a href=http://www.kickassvps.com/>KickAss</a>
<a href=http://rimuhosting.com/>RimuHosting</a>
<a href=http://www.interserver.net/>InterServer</a>
<a href=http://www.ssdnodes.com/>SSD Nodes</a>
<a href=http://www.vservercenter.com/>vServer Center</a>
<a href=http://webkeepers.com/>Webkeepers</a>
<a href=http://aws.amazon.com/ec2/>Amazon EC2</a>
<p>Somewhere, sometime I gathered the following for different architectures:
<pre>For shell accounts:

http://www.mtxia.com/js/SiteOx/shellaccount.shtml
HP/UX 11.31 PA-RISC
HP/UX 11.31 Itanium
Linux PPC
AIX 6.1
Some fairly recent gcc or clang

http://www-304.ibm.com/</pre>