What if users could submit any site's RSS feed to ScriptLance, for inclusion in their personal news feed? You could stay up to date on multiple items, whether thats tech news or updates from other freelancing sites, whenever you login to ScriptLance and view your account news feed.

You could also stay up to date on more SL content: by importing the feedback site RSS, the blog RSS, project RSS, etc.

Freelancers should be allowed to send invoices to regular customers for tasks they have done. Running another project for each new task when you already established business relationships with a buyer sounds like a waste of time. Both buyers and freelancers cold get reviews for invoice and thus affect their rating. There could be limit of say one invoice per week per freelancer-buyer to avoid abusing invoice system to get fake reviews/rating.

If buyer is allowed to escrow with poor rating it will be in high risk to get transferred once released. So, Scriptlance should ensure a risk free payment

Forcing NEW buyers to post projects limited to verified and certified freelancers will decrease the chance of failure for the buyer's first project.

This could apply to buyers who signup up within X days, or only for their first Y projects posted.

Display the Project Cancellation Ratio in anywhere in front page so that a Programmer can get an idea before he cancel any project . 

Display how many concurrent projects has the coder in hands. Its frustating to select someone and then realize that he is working in another 3-4 projects at the same time.

It happend to me many times, and I'm sure that other buyers should have the same bad experiance, to select a programmer and later on, to find him working on other projects too. Result? Getting emails from the programmer asking for something that is not on my project, or big delays on delivery. Worst than all (that's why I'm asking to not allow bids in other projects), when you face the problem to have the coder disappeared or delaying in replies, because after eg my cheap project of $100, he awarded a new one of $1,000.