Actually, there are many IM's that link directly into Conversations and from my experience, they all work just fine. (Skype, Google Talk, Facebook, Jabber, MSN, the now dead OVI etc). As for IM clients, the N900 is not an iPhone or Android phone which needs seperate applications for IM, that is the whole point of conversations, all these IM's rolled into one. If LiveProfile and Whatsapp could be added to the VoIP and IM accounts it would be great.