Data Access Pages do give you the ability to post data to the db through a browser but they are limited in that ability. There is also very little support for them. It seems that very few people are using them as well so forum info is very limited. You don't really convert a form to a DAP but build the DAP as a new entity.
Combo boxes will not work on a DAP (or at least I haven't found a way for them to) so retrieving records gets to be a pain. As far as other controls, you will just have to try them and see if they are available in DAP.
What I am working on is linking the table (coverted to Excel) to a webpage and then adding controls to the web page for data entry / retrieval. We have several sites that do this but the security is very lax so that is what I am working on now.
If you find any good sources for information about DAP's, please post back for the benefit of all.
Autoeng