I've been hard at work doing a ground-up rewrite of Screebl, with a focus on hardware compatibility, battery consumption and simplification.
Things have gotten stable enough that I'm releasing a beta version of the software here:
You can expect things to NOT look pretty right now, but basic functionality is there and should hopefully be much more stable. You should also see significant reduction in battery consumption on a large number of devices.
Lots of stuff not there yet, including Locale, Tasker, SmartLock, WidgetLocker integration, pretty home screen, etc, but that will all come over the next few weeks.
I will be adding some cool new stuff to pro, including a widget, better visual customization, and some other integrations.
Please give feedback on your experience!