What's a Blog?

I asked myself that for the first time today.. I was talking to an old friend over AIM who linked me to her blogger.. "What's a Blog?".. Evidently it's the lazy way of telling someone what's going on in your life.. Or is it actually brilliant? Either way, I decided to try it for myself. Not like I really ever have anything interesting going on that anyone would care to learn about.. But just in case, I have my blog URL ready! Now if I can remember to bookmark this and actually post lifes current events...