I don't want to sound mean, but I've got a lot of negative feedback intended to be helpful.
For starters, your colors are hideous. There's no color scheme... it looks like you just threw darts at a crayon box and picked those colors.
The "Select Website" section should have text... I have no idea what those icons are supposed to represent, and if I didn't accidentally scroll over one I would never have noticed the ALT tag.
You have 2 easily fixed W3c errors.
Fix them.
I see zero thought put into the layout. None whatsoever. Your homepage is just a list of projects... you should focus on getting users to sign up first. Try putting in a graphic enticing users to join.
Speaking of graphics, your site basically has none. Compare your homepage to that of this site (Dream in Code) and guess which one users will find more visually appealing. (DIC isn't even ideal, by the way. It's just better than yours)
You've done your SEO homework it seems, but that isn't going to convert traffic into sales for you. See my previous comment.
Your site is built entirely with tables... and for a site geared towards web development, that isn't good.
I can't search for coders or projects based on location? I think you'll find most people want local developers/projects.
You've got a lot of work to do... good luck.