Since I've been testing the v0.5 betas for a while, and I've ported my own theme to it, I thought I'd give some information. First, the framework has changed and the apps have been updated, so the v0.4 themes won't work without some updating. The good news is that the services.jar from v0.4 works just fine. Also, in framework-res.apk, the following files from v0.4 can be used: (1) in the drawable folder, the progress_horizontal.xml and, (2) from the layout folder, status_bar.xml, status_bar_expanded.xml and status_bar_latest_event_content.xml. You just need to insert those files into the new framework-res.apk.