on homepage, when u mouse over the text "F27 Portfolio | Network of sites", it shows underline which confuses user that there is a link so remove that underline for mouse over
1 more thing, on "http://f27.org/checkmyspecs.html" page, there is link for checkmyspecs.org but it opens in a same page, I would suggest that it should open in a new window so that user is not navigated away from ur site.
Pointless comments aside, if you wanted a simple, clear page to show your sites, I think it's fine (if you're happy with the layout, colors, etc). The main element (featured site) is presented well as it's pretty much the first focal point on the page. If you were concerned with typography, you might consider matching the font better. For instance, if you're using a serif for a title, use it for all titles and if you're using a sans-serif for the body text, use it in all (graphics or text). Two other recommendations: 1. Your featured site doesn't have links. If possible, make that text above the left screen shot clickable. 2. Consider linking each site's logo when it's brought up. People tend to click logos out of habit first then look for text links. Good luck.
Personally i dont like the use of tables in any way. So first thing that i would suggest is that you stop using tables . There are better alternatives for what you're trying to do, the best alternative is to use a javascript gallery ( there are many out there if you'd like i could point you to some great ones but you could always google em ) Secondly ( Sorry! We found the following errors (1) in your css ) Your markup isn't valid (23 Errors found while checking this document as XHTML 1.0 Transitional!) As far as the design goes , i like it. Very simple ; but you should change the font style in your main logo . Regards, Ace.