Yeah, you really need to go through your paragraphs and capitalize...think back to English class and try to think of what kinda grade you would get on that content. Also this is kinda big, I would highly encourage you to use a contact form with captcha rather than an email with mailto:. Your site is going to get scraped by bots just looking for email addresses, when they find it they will spam it so much you will most likely need to make a new email address.
The logo is "cute". I don't like "cute". Maybe for a bakery, but doesn't do anything for me in a design site.
I don't mind the lack of capitalization. I understand the look/feel you were going for.
Drop the "Valid HTML" link. Clients do not care.
Contact page, the address floats on top of "send us an email" in IE7. As mentioned, add a form, most people expect it.
Portfolio..show a complete (4 page or so) site for an imaginary customer. In fact, several. Why show "Where we were, but decided to leave" Ion?