You'll have to make sure to build your app to not make any assumptions about where it's running (ex: links to "http://localhost:3000/path), but you should be doing that anyway.
You have to have Apache setup (which, when developing a new project, you may likely not have even reached that point).
You can also save your current file by going to File > Save. But Ctrl/Cmd+S is easier (and probably what you use every day).
Showoff project is definitely cool, but instead of apache, nginx installs in one command and can easily proxy like this with about 10 lines of easily googled config using 1/10 of the resources on a simple prgmr account or the like.
Then again, I'm quite happy with a VPS setup since I get all of the extra benefits of having the server around...