To blog or not to blog?

I've been debating on whether or not to start a "family" blog for a few months now. In an attempt to document our new lives as parents and as an extra excuse to brag about, in my opinon, THE most adorable little child ever known to man, I am finally giving into the blogging world. I'm hoping that this lasts longer than most diaries or journals I have kept....usually lasting all of about 10 pages, with entries spread months and sometimes years apart!