Prowl ($2.99 - iTunes link) sends Growl alerts to your iPhone via Push Notification. That's right, duck and cover, we've just found the nu-cu-lar option.
Growl is a well known 3rd party alert system for Mac OS X and provides heads up display of incoming email, twitter, file transfer, chats, downloads, and just about anything you can shake an "I want to know" at. And Windows users, don't you fret -- they're working on a beta for Microsoft's platform as well.
