Just a few more while you are at it:
1 - CSS is missing, so the font and links show on each individual visitors' computer as their default font type and colors. This can be a major issue with non-latin based lanuages like Chinese, Thai, Arabic, since they ussualy have non-standard fonts as their default to show their own character sets.
2 - The code doesn't close ie; </body></html> tags aren't there, this can cause some search engines and mobile devices like PDAs and mobile phones not to read the page correctly!
3 - It's much better for SEO to move the image map tags down to the bottom of the page just before you close the </body> tag.
Keep up the good work