FavesTime
You might notice something new in the next (free update) version of my speed-dial app, Favorites for iPhone.
Personally, I'd buy a copy right now (for a ridiculously paltry $1.99) just so you're prepared.
And yes, it lets you call 4th-generation iPod touches via an email address too - though Favorites itself only runs on iPhones (for the moment).
Comments and faves
Simon Strandgaard added this photo to his favorites. (33 months ago)
Photos of Perre (32 months ago | reply)
Cool. Looks like you figured out how to keep the three-up display and add video calling.