Our Lab course on "Developing Interactive Mobile Applications" started today with 11 students (the limit was 8 - but 3 more is OK as we got some additional phones from Nokia).
Shortly after lunch everyone had there first application written and deployed to the phone. In the afternoon we looked into sending an SMS from JAVA using the messaging API.... And this is fairly easy.
For more details on the course see: http://uie.bit.uni-bonn.de/developing.php
Seeing the possibilities of JAVA ME and how quick people get applications running made me wonder how long it takes till we have massive mal-ware, viruses and spam on the phone. Secutity on phones may be one of the upcomming challenges.