Been covered in this thread: http://www.internettablettalk.com/fo...ead.php?t=2628

Mini-instruction: go to http://www.maemo.org/maemowiki/ApplicationRepositories and find the entry that says maemo-gaim and enter that info in your Application Manager as a new repository, go online and refresh the application lists and then just mark Gaim and whatever protocols you want (ICQ, MSN etc) for download and installation and poof, you're IM:ing.