iPhone phone app replacer

After a post  from TUAW , I've decided to give Pinger for the iPhone a try.  It has some really great features that I will be trying out.  It's kind of a one stop shop for iPhone communication, incorporating Myspace feeds, IM, and obviously the phone as well as other features.  I'll let you know my thoughts on it after a week or so of use.  So far it's promising.