A few weeks ago, I got a cool Christmas present from work. It's pretty sweet, and I've been writing some apps for it. I'll try and blog about them here.
A while ago, I wrote some a number of account plugins for Maemo 5, so that other Telepathy connection managers could be used and well-integrated into the N900's Contacts and Conversations User interface. This enables the following extra protocols:
- AIM
- GaduGadu
- Groupwise
- ICQ
- IRC (currently only supports 1-to-1 private messages)
- MSN (soon to gain calling support)
- link-local XMPP
- Sametime
- Yahoo
There are still a few problems which I'll try to iron out soon enough but they appear to be working pretty well. The best thing about it is clearly the integration with the rest of the phone, as demonstrated by Marco in the screenshot above.
The PR1.1 update, which is due today, also opens the door for enabling other protocols dynamically by providing libpurple plugins. I will be adding Facebook Chat support soon, and someone else has made a package for Twitter.
This is in extras-testing for you all to download and try out. You can find all the packages in the "Network" category of the Application manager. The Extra protocol plugins for Conversations and Contacts metapackage (telepathy-extras, in reality) pulls in all the cool account plugins and connection managers of the time. File bugs from the maemo.org package link.
These are practically mandatory and great add-ons to Maemo.
Sadly they are still in -devel, they should get into default installation ASAP.
greets from germany your tool is great, okay its the best
ive just
noticed a little problem after the new arrived update (from the
14th of january , i guess it was pr1.1) , it isnt possible (for
me?) anymore to log in via icq :). thanks alot 
"Pidgin Protocols for Contacts and Conversations" version 0.8, the appropriate packages for Facebook will be pulled in.
I have nothing to do with Pidgin on maemo apart from maintaining the libpurple-using connection manager and its account plugins.