I'd like to request support for Jabber instant messaging in the users profiles of WP. From Jabber.org:
Jabber is a set of streaming XML protocols and technologies that enable any two entities on the Internet to exchange messages, presence, and other structured information in close to real time. The first Jabber application is an instant messaging (IM) network that offers functionality similar to legacy IM services such as AIM, ICQ, MSN, and Yahoo.[more...]
With a single Jabber account you can have gateways to all the other IM systems, plus the Jabber protocols are free, open, public, and easily understandable. This means they are not tied to any company or commercial interests.
Another use would be notification of comments via IM, as suggested here: