I'm concerned that the memory limitation on the shared account rules out Plone. This would be a site with 3 or 4 authors, so it is suitable for caching.
I found some good answers here: http://forum.webfaction.com/viewtopic.php?id=1259
In short: a basic shared account is probably not enough for Plone.
This is correct. You can host Plone on a shared account, but not a "basic" shared account (80 MB RAM). You will probably want at least 160MB of memory for a basic Plone site, and most clients using Plone have the maximum allowable memory (240MB).
Plone itself recommends 512 MB of memory, but we make it available on our platform for smaller applications that will be able to fit the application into their plan's memory allocation.
answered Feb 10 '11 at 23:56