List of current and upcoming cloud platforms

PiCloud (http://www.picloud.com/) is an offering for Python.

http://www.akshell.com is another one, although it doesn't fit under any of the headings since it's a JavaScript platform that doesn't use Node.

Windows Azure isn't just .Net. There's Ruby, Python, PHP and Java.

http://www.microsoft.com/windowsazure/interop/

[edit] I've just thought, the Ruby and Python support might technically be through .Net via IronRuby and IronPython, but I'm not sure. This certainly doesn't apply to PHP or Java though.

I think Joyent's Node.js cloud service should probably be added, considering that's where it's being actively developed right now.

This list is missing the excellent ep.io.

Two more:

1) http://apps.jgate.de based on AppJet, runs JavaScript apps and CouchDB (open beta)

2) http://cloudno.de based on Nodester, runs Node.js apps and CouchDB (private beta)

Andy, if you would, please add us NodeSocket. We are a node.js hosting platform for developers.

Great list, added some suggestions to your comments.

For Twitter users, I made a list of PaaS offerings here: http://twitter.com/peakscale/paas/members

There is another solution called Bitnami cloud (http://bitnami.org/cloud) that is not in the list.

Perl Cloud at Phenona http://www.phenona.com/

I believe Windows Azure is considered PaaS.