Funny you should ask; we're literally within days of rolling out our
(furfly) OpenACS hosting service.
If you sign up, you will get a full shell account (via secure shell),
ftp, DNS, as many mail aliases as you want (controlled yourself
via .qmail files), AOLserver, Postgres, etc. We won't install the
ACS for you, but we'll make the tarball available (it's not
necessary to use OpenACS to use our service). You'll get a
resonable amount of disk space and bandwidth (yet to be exactly
pinned down but probably 100 MB disk and 1GB/month transfer).
The hardware is Dell 2450's (same as we use for our other ACS
customers) on Linux and hosted at Exodus.
Price will be $100 a month during development, $200 a month
after going "live"., with a $500 setup fee and a $200 "launch" fee
We'll announce it here when it's ready and/or you can check out
http://openacs.furfly.net for details. The site is up now, but is not
complete yet.