All of them? I have been able to get many apps this way. Most work, but some either are flagged "private" (free apps too, yet still private) which prevents offloading/backup, or when I try to install them on the edge, it says they cannot be.

My prefered method of offloading is to download/install from the market, got to Astro File Manager, back up apps I want, zip all of them into one file, go to dropbox, click upload and chose the zip file. Then when it's done, I shut down the emulator, open my edge and download the zip from dropbox, and install the apks.

Here is a short list of apps I have loaded after obtaining them from the market that work on my edge:
Borders Books
Kindle App
Jorte
AndCAD Demo
Factbook
Epocrates
Google Translate
First Aid
BeamReader Demo
Meebo
CNET Audio
Magic Doodle
HandyCalc

Disclaimer: I accept responsibility for any damage these actions may have on my device (though there has been none so far), as does anyone using the methods I have described. All apps I obtain have been free apps.