Although it is true that Vizio initially saves the applications on internal storage, you can very easily move most apps to the SD card. Just go into Settings>Applications>Storage Use. Each application on your tablet will be listed, and you can move it to the SD card if the app allows it. If the application is on the device but can't run from the SD card, the option to move will not be highlighted. Otherwise, the button will say "Move to SD card" if it is on the device and "Move to device" if it is on the SD card. It's a very quick and painless transfer.
The process is discussed in the user's manual, but may have been overlooked since the user's manual is on the device rather than provided in printed form. At any rate, it is very easy to move most applications, even if you can't save it to the SD card from the outset.
IMPORTANT EDIT: It appears the "SD card" referred to is actually the internal virtual SD card rather than the external physical SD card. So all you're actually doing is moving the app from one section of internal storage to another.
However, I tried moving an app to the actual SD card using the Astro file manager and it seemed to work fine. YMMV. Hopefully Vizio will choose to resolve this problem in the future, although it may not actually be a problem for most people since the available app storage space may be adequate for people that don't have hundreds of apps (or dozens of large ones).
Last edited by SteveK; 11-05-2011 at 05:17 PM.