Templates/CSS for iPhone and other mobile devices

[Sean Gilligan]

I'm working on a proposal for a web site (webapp) that is targeting
multiple mobile devices including the iPhone. This means I won't be
using iUI :(

I'm wondering if anyone can recommend a CSS framework or set of page
templates that could be used for a cross-section of mobile devices. I'm
still communicating with the client about what their 'baseline' should
be, but I imagine it would be in one of two general categories:

1) XHTML/MP devices
2) Recent high-end devices, such as iPhone, Blackberry 4.0, etc.

For option #1, I found this site (http://www.passani.it/gap/) that in
addition to 'best practices' provides a set of templates for simple content.

Does anyone have any recommendations?

Thanks in advance,

Sean