I seldom tweet but have linked the blog directly to twitter. With some carefull analysis it is possible to automatically create inviting links and have twitter resolve them.
Jeroen Steeman on Twitter
I personally use facebook to keep in contact with good friends on four continents and help commercial companies get an interactive presence on facebook.
Jeroen Steeman on Facebook
Don't pay half as much attention to LinkedIn as others say I should. Also linked the blog to it, so it sort of keeps things up to date.
Jeroen Steeman on LinkedIN
A collection of images that made an impression, taken and generated during the course of time.
Jeroen on Pinterest
Sharing interesting bits of bitmaps with others. Images of things I come across and find worth sharing.
Jeroen on Flickr