1and1 does not use cpanel, no, theyre also discussed here alot .. and it tends to be about install/setup issues.
iPowerWeb doesnt use cpanel either.
while hostgator uses cpanel, they were also massively hacked via the last cpanel security problem. Frankly, that tells me a lot about them.
One of the hosts mentioned on that blogspot blog is lunarpages, I had three domains on LP for some time. I have to be honest and say the support was pretty wretched. I needed a backup at the point my nephew closed an account, and if I remember correctly, they wanted $50.00 for a copy.
as far as aso goes, they also have live beta supprt chat, which the 2 times Ive needed support, has been wonderful, and immediate. They update their forums also, with any outage issues, and seem to be very timely about replying to posts within the forums.
They offer php4 and 5, and I actually needed curl which I didnt seem to have available initially, and in 5 minutes time, after asking, I had it. The same with the ssh request.