Kim uses Twitter as a repository for baby memories:
If you don't already know, Twitter is kind of a blogging/chat/texting hybrid. Its main appeal is convenience: you can update it via the Web or IM software or through cute little desktop apps for your cell phone.
I signed up for an account on behalf of my baby son. I can record all those zillions of little milestones that fly by, and most importantly, I can do it quickly and, if necessary, one-handedly. Blogging or (gasp) sitting down to physically write is usually too much for a new parent. I'm kicking myself for not signing up before he was born!
Even nicer, the far-flung friends and relatives can follow your Twitter feed, too. (Kim's followup: Twitter allows you to approve who's following you, so you can keep your baby updates as private as you wish.)