Copy files 5x faster than wi-fi sharing
Okay, here's a neat trick I just figured out. This may be old news, but new to me...
Copying files via wi-fi sharing to the playbook typically chugs along at close to 1MB/sec.
Downloading files in the browser runs much faster (5+ MB/sec).
Any files placed in the media share are picked up by the media library (music, photo, video apps). This includes the downloads folder.
So if you happen to have a web-server running on your Mac or PC, you can just make your large media files available via the web server then tap&hold on files to "save link as".
Files will download to the device close to 5x faster via this method.
You can move files around in your wi-fi share afterwards (ie. from downloads/ to videos/) if you want without incurring a copy penalty.
While this may not be terribly convenient for copying multiple files, you can always make a .zip of the files and hunt around for an unzip app. If there isn't one out there yet, you can bet there will be.
Of course, by then the wi-fi sharing may be running at full speed :)