I manage a band (www.badpennyboys.com) in the San Francisco Bay Area
of California.  I'm looking for web sites with information about
possible corporate sponsors for the band.  For example, Jagermeister
sponsors heavy metal bands...
http://www.jager.com/frontdoor/rocking.cfm.  which is great, but my
band is not heavy, they are pop/rock.

I would like to find a list of companies (with web sites preferably) -
no restrictions on company industry at this point - who currently
sponsor bands in the United States, that I can follow-up with.

bandmanager-ga,

I know that both Miller Beer and Budweiser Beer companies sponsor rock
bands in terms of touring and promotion. (Bud is owned by Anheiser
Busch) As far as specific contact information, I can't help you there,
but you should try searching Google for:

Miller band sponsorships
Budweiser rock sponsor

and other queries of that nature.

Hope this helps,

omniscientbeing-ga