Now with a 8GB Solid state drive rather then a 4GB.
NAVPad 10.4" Bluetooth TabletPC with Sunlight Touchscreen Display, with 512MB RAM * Windows XP & XPe – instant on/off convenience and software compatibility
* Touchscreen convenience and Class II EFB compliance
* Bluetooth interface for GPS and XM WX and optional wireless of in-cockpit and ground connectivity
* Solid-state and hard drive storage options to meet your storage and altitude requirements
* Cockpit power supplies and hot-swap battery options for maximum flexibility
* Can be cockpit mount or hand-held
* Powerful and flexible to run your on-the-ground software too
I think I have tried all of the PDA based applications and I also tried WxWorx in an earlier version using a laptop. The one I am using now is NAVAir which so far has performed extremely well. I am reluctant to get into PC based applications because of the altitude issue since I regularly fly at 12000 and above. ATC direct routing is very easy to get when you are at 14000. No one else is there.
NAVAir News 
