Earlier quoted context omitted.
Doesn't Quicksilver already offer this same functionality? I'm also unsure if I would use this app.
Sure, using Alfred without the power pack ctrl+space "Mail" cmd+n "person@example.com" tab(x3) "Subject" tab(x5) "Message Body" shift+cmd+d Tabs may vary.
I would have no use for the original app in the link, I mean how hard is it to just do cmd+tab and cmd+n in Mail ?