theme support alternative

Hi.

Is there any alternative to the theme support plugin? I know it has
been ported to 2.3 by James Steward(which did an awesome job).

At the same time I am worried that coming 3.0 everything in that code
will break. I am at the beginning of the dev cycle for themes so I
would prefer a newer, post rails 2.2 or 2.3, alternative.