Over-The-Air Download Tests Made (All the below apps requires MDS):

VIRCA - IRC Chat Software
Website: http://www.vidarholen.net/contents/virca/
OTA Download: http://www.vidarholen.net/contents/virca/Virca.jad
Note: It seems to work much better than WLIrc! But you must not idle for more than 2 minutes if using Mailstreet (120 second timeout)

VNC - Remote access similiar to PCAnywhere / GoToMyPC
Website: http://j2mevnc.sourceforge.net/
OTA Download: http://j2mevnc.sourceforge.net/downloads/VNCen.jad
Note: Programmers still fixing mouse-button bugs

IM+ Trial - MSN/ICQ/AIM/Yahoo chat
Website: http://midlet.org/category.jsp?parentLevel=222
OTA Download: http://midlet.org/repository/shapese...full_trial.jad
Note: Appears to work on my Blackberry, competitor to WebMessenger (prefer WebMessenger though)