Sean wrote
www.webhost4life.com - Support understands DNN, control panel is decent and large MS DB (2,000mb). Some people say there are uptime issues, but I have not had any such problems.
www.1and1.com - Support does not understand DNN, but it is cheap and tons of space and transfer. The control panel is the best I have seen so far. Installing here my be a challenge, I have heard some people have been successful, but support will not help you.
I'm currently with WH4L and was with 1and1 before moving to WH4L.
My primary website is an ASP application that I developed with a few calls to some ASPX file (image resampling). DNN is more of a playground for me on WH4L.
The issue that I have with WH4L is that I've found the DNN performance to be sluggish.
I have had very little downtime on my site. I've had very few times where there were problems...typically, it was that the database server was unresponsible. In most of these cases, the problem lasted less than 15-minutes. In the most recent outage, I did use their Help Desk and was back up within 30 minutes. I've found their support to definitely do what they're supposed to....provide support.
I would NOT recommend 1and1 due to their lack of support. The final straw for me was when all of the ASPX files on my site stopped working. My support issues were responded with "the problem must be in your code." However, even any empty ASPX file didn't load correctly (my site didn't have/need a web.config file); I could run the same file with no problems on different web servers. They didn't seem to be willing to consider that the problem was on their end and didn't seem to want to resolve the problem.