Greg Ferenstein has posted on Mashable a list of five services and tools that help mobile journalists "rival a fully functional news team."
They're pretty basic but useful as such:
1. Google Voice for interviewing and record-keeping. 2. Ustream for uploading and downloading video. 3. Reeldirector for video editing on the iPhone. 4. Fast fingers. These aren't software, they're yours. 5. Wordpress as a publishing tool.