IM+ for Skype for iPhone allows you to enjoy Skype functionality on your iPhone. You may stay online no matter where you are, chat with your friends and colleagues and call/receive calls at a low cost. Here is a nice article on this app.

Recently this app has moved to a new domain name and is now out of Beta. For a limited time IM+ for Skype is free to use. The service uses a simple Internet protocol. You will be charged for data connection, just as you are for web surfing according to your wireless carrier rates.