Using Mobile Devices
The Web Evangelism Newsletter had a report about using mobile devices to share the gospel:

Although mobile devices have been with us for some years, till now there have not been too many avenues to use the medium for evangelism. With the
new 3G devices, things may change. At last it is practical to download, and pass to friends, video and cartoon clips. There is great potential for short specially-made downloads of this type, and Christians are discussing the best way to utilize this medium. They recommend ATS Tracts as one of several groups developing material in this area. Finally, check out the Gospelcom guide to mobile tech.

Now that the enemy is preparing to send porn to mobile devices, I think it's only fair to counter with the Gospel.