Shiny webserver control panels

[Brian]

Looking for any reviews/recommendations/etc on end-user geared
website/mailbox control panel packages for linux servers running many
sites in a shared environment.

I've looked a bit (a very short bit) at Plesk, which on the surface
seems okay.

Anybody have any good insights to share?  I use webmin a lot myself, but
not sure if I really want to make that an end-user offering.
-- 
Brian <lists at karas.net>