I would love it if they had this at Slicehost. It seems so stupid to have to configure a basic web server from scratch again when it's been done millions of times before me. Set up a great standard setup and then let me tune from there.
I built SliceApp.com to solve this problem. Spent the past couple week reworking it. It will work with Slicehost, Linode, Rackspace Cloud...anything running Ubuntu accessible via SSH. Actively working on it and open to suggestions on what would make it better.
a) info on versions would be nice
b) more options (ftp, mail, sphinx, lucene, etc)
c) maybe a short questionnaire about usage to optimize config
d) I'd like to see more about security and who you are before I hand over username/pw
PS - You should post this as a "Tell HN" here if you haven't already...