Usergroup defined user profile fields!

[FleaBag]

OK so I was brainstorming on ways I could spice up my site, and provide different levels/types of user accounts. For instance user a is a band, and has lots of band related content in his profile, user b is a venue and will not have the same information listed, or features available, user c is a member of the public also with different needs.

I was thinking that if I could restrict user profile field selection to usergroups I could emulate these different levels in user accounts. This combined with template conditionals could provide a dynamic and modular system for representing differing entities within a community.

For instance, a user would be an mp3 player within a profile. A simple MP applet drawing the file url from a profile field, in 5 other profile fields are 5 different song url's. A dropdown box on page would allow for switching between tracks. Of course I want every user of this level to be able to specify up to 5 url's.
...While a user at another level could include up to 10.

A very simple solution to the problem. Obviously the use could break down to a much lower level... Allowing some profile data to only be allowed for certain groups.

Maybe I'm missing something but I don't see a hack or anything stock that would allow me to pull this off. Your help would be greatly appreciated!