Zach: Thanks for the info. I'm glad to hear it works with the A620, but its pretty sad to find out its that hard on the battery. By the sound of it, you must not get more than 30 mins of usage with it before it has to be recharged.
Are you using the latest ROM revision and the WM2003 driver? I'm wondering if that may help. Really, what good is WiFi if you can only use the device for a short period of time?
I presume you can access the card memory fine with the Asus.