[philgr]

I like the idea of using the iPad as a second screen while I develop, keeping Dash at arm's reach all the time.

If you don't find the necessity for that on a Mac (or if your desk is short of space), use the OS X version, if you're on Windows, I suggest you take a look at Zeal (http://zealdocs.org).

[tomengland]

Yep. Dash also has support for in-editor lookup. For sublime, highlight the function IE: app.use and hit ctrl+h, it'll popup the express documentation. Very handy!