I am writing this for the people who are passionate to create themes for SilverStripe. I have a free template portal, and recently the count of the template became 50, so there are 50 designs in PSD format.
I had a plan to make them available to use with SilverStripe, but I dont have much time to spend on converting them. So if anyone interested to work with me to make them available for SilverStripe you are welcome.
The URL for the template portal is http://templates.whynotonline.com. I believe that if we can make them available it will be a great service to the new people who joins the SilverStripe community. So if you are interested just write to me fonsekaean[at]gmail[dot]com.