So I had a SharePoint Bat Phone call today about a client of Readify's that had created a Survey in WSS 3.0 with two simple questions and wanted it to be viewed on a Windows Mobile Device. They were aware that SharePoint had a out of the box Mobile view of all it's pages. It's one of the top 10 reasons to use SharePoint from the marketing site.
The MSDN homepage for SharePoint Mobile Development is great as a kick start into this area. The Mobile Fields Table page basically outlines how elements are rendered in the Mobile View. This explains that all out of the box Site Column Types are rendered correctly. Obviously if you create your own custom fields and Site Columns you are going to have some extra overheads that won't work straight away for you.
If you want to customise the actual Mobile List View Page or Form Page there are How To's on this too.
The problem there were having was that Surveys do not support a Mobile View. There is not much out there to document what can and can't be supported by the "/m/" switch on SharePoint URLs.
The problem with trying to get non-supporting List Views to be mobile compatible is that you can't select 'Modify this View' on a Survey via the Web Interface like you can with other Types of SharePoint Lists such as Custom Lists, Document Libraries etc. And therefore can't get to these options.
There are probably ways to extend SharePoint Surveys, but I would recommend looking at your requirements and seeing whether you can use a simple Custom List with multiple Columns that represent Questions. You're not going to get the "lite" reporting you get out of Surveys, but at least it'll be Mobile View compatible.
If anyone can point me to a list of non-compatible Mobile interfaces for SharePoint I'd greatly appreciate it and so would the rest of the community no doubt!