Dropbox has became an indispensable web development tool for me. It lets you share and sync files across multiple computers - your desktop, laptop, and netbook. It also keeps a history of your edits, like google docs. I use it as a poor man's svn to keep track of my edits to pages on Wopular, in addition to syncing design comps, and to-do lists. Since I already use my HD2 to pick stores to feature on the site, I thought wouldn't it be nice if I could also do some coding with it.