Read in Blogger Buzz: Twitter badge for Blogger and tested it on Blogging Ideas. Currently it is right at the bottom of the second left sidebar. However, as new Page Elements are added/deleted/moved, it may end up somewhere else, but it will still be in the sidebar, and most likely near the bottom as I don't put high priority in it.
Looks like Twitter is founded by Biz Stone. Biz Stone is co-founder also helped make Xanga, Blogger, Odeo, and Obvious. Biz sometimes writes books about what people are doing on the Internet. Biz Stone was Senior Specialist for Blogger until he left Blogger, so he should be very familiar with blogging and I believe Twitter will be very good for bloggers to connect with readers, family who may be far away, relatives, friends, etc. I think it is an especially good idea for a family blog.