If someone follows you on Twitter, Send a Thank You tweet with an image.
NOTE: To use this Applet, you MUST create a filter in Gmail (under preferences > filters) that labels incoming Twitter follower messages as "TwitterFollower" or it will not function! (I've had it enabled forever and never realized this until recently!) You'll also want to create/find your own Thank You image as the one in the Applet is mine. lol