Well I feel like a bit of a luddite waiting this long to join the micro-blogging bandwagon, but I finally have. I guess I found all the hype a bit off-putting.
I am now on Twitter @rosskendall
Also, since I'm an Open Source (and open-data) fan, I have also signed up on Identi.ca - identi.ca/rosskendall
(the two accounts are linked, so all identi.ca posts end up on twitter)
Since I am usually short on time to write proper blog posts, I actually find micro-blogging suits me well. It is also a great way to keep up-to-date with things I am interested in - and pass helpful things on.
I'm going to keep my twitter posts focused on web-development, including: Magento, Drupal, programming (Perl and PHP), design, SEO, etc. I find trivial personal comments a bit distracting, especially if there are lots of them, so I won't be making them myself