Our own Mel Martin is a big fan of Vito Technology's Star Walk iPhone app, so when the company's rep stopped by our booth at Macworld this week to show us two apps that they're working on right now, we couldn't refuse.

The first app we saw was called Solar Walk, and while Star Walk will help you find and explore information about the stars, Solar Walk is designed to do the same with planets. The app features a beautiful (and accurate) simulation of the solar system, complete with all of the planets orbiting trails, and an adjustable clock so that you can see where Mars will be in 2029, if you so choose.