An initial version of the ICEfaces Woodstock "look alike" theme is available (attached to this post). The release is a bit later than expected, but will definitely help with anyone migrating from Woodstock.
This theme isn't considered production ready yet, but with your help and input we can get it set to include in the next release. Future versions integrating community suggestions will continue to be posted in this thread, so have at it.
The attached zip is packaged similarly to the existing three themes (rime, royale, xp), and you can include it in your app by dropping it in your web directory and pointing to the css file from one of your pages (simple enough really).
Eventually the finished theme will be added to component showcase, but for now any local testing you can do would be pretty snazzy.