Dropbox is excellent. Have the PC ver installed on my laptop at home and my desktop at work AND my pocket edge too! I can download apk files on my notebook, drag to the dropbox, then install directly from the dropbox app on my edge. Also, word docs, excel SS's, pdf's etc will open (and save too) directly from dropbox to my PE's Office Suite Pro (free on getjar.com android apps site) ..
Dropbox (and to a lesser extent, Google Docs) have proven invaluable with the PE and the rest of my equipment as well. And it's free
Click this link to open a free dropbox:
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Always have your stuff when you need it with @Dropbox. 2GB account is free PLUS a bonus 250MB for being referred by me!
http://db.tt/rmJeR1Sw