SmileOnMyMac, LLC has TextExpander (iTunes Link) in the iTunes App Store for $1.99 (4.99 – 3 instant savings) for a limited time.

With TextExpander touch, you create a library of abbreviation shortcuts for snippets of text that you use frequently, such as addresses, URLs, and standard replies. Tap that abbreviation, and it automatically expands to the full snippet. (You can even insert today’s date automatically with the default abbreviation “ddate”!)

You can use your TextExpander touch snippets directly in over 100 apps that support it, including Twittelator, TwitBird Pro, Elements, Simplenote, WriteRoom, Circus Ponies NoteBook, DEVONthink To Go, BusyToDo, Things, and Zendesk. See http://www.smilesoftware.com/applist for a complete list.