I thought some might be interested.
I moved 2 sites I have designed using SPIP (http://www.spip.net/) to my dreamhost accounts.
I used a SPIP v1.8 and a SPIP V1.7.3 that I have heavily modified.
It works fine. No problemos with PHP running as CGI, no problems with MySQL,
no problems sending mails via the site.
Everything's running smooth.
Only small "issue", Mysql seems to be slower than with my previous hosting.