[natabbotts]

I'll clarify a few things before I comment, just in case people have misunderstood things. 1) Google Docs will store any file. 2) Google Docs allows you to convert pdfs to docs & edit them.

With this in mind, I prefer Google Docs, as Dropbox, to my eye, has no advantage. Perhaps you would argue that Dropbox syncs automatically. I think we must consider that GDocs are only stored in the cloud, so don't need to be synced.

I would also add that you need to have DropBox installed to sync files (though web access only needs... well... Web Access). So GDocs is just as good in that respect.