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Enjoy to your hearts content. Someone might read it, and tell someone else, and you could become rich and famous. Or not. But have fun doing it. I not blogging today simply because it looks like about as much work as maintaining ad campaigns, and I don't need it. I love to write too, so by all means, enjoy, and blaze the trail for those of us who will follow.
People you've never met will show up and start leaving advice in your comments area (not to mention all the people kindly informing you about their incredible online collection of indecent celebrity photos... lol).
I keep forgetting I have half my life's story online, until an old friend emails about something on the site, or someone walks up at a PubCon and asks for an update.
"cleaned up" vs. "warts and all"?
Well, that's all about your comfort level... I think if you're inclined to want to clean it up later, you should probably start out writing a little "further from the edge." If you get more comfortable later your content will evolve, and if not, at least you won't have to go back through it editing everything.