Hi there,
First of all, I really know GSA only since a few weeks. I ordered a Remote Desktop at Extreme SEO Tools for XRumer. This RDP was loaded with SEO tools with the GSA suit among them. I checked it out and must say I'm quite impressed by the software and use it now for every project with good results.
Now what this thread is about; just recently I was thinking about how to help out the community and have a little benefit of it myself. Then it occurred to me that Google threats subdomains as independent domains. I thought what if I could make a site where people could easily register a subdomain and put their article text on it among with their links and their own anchors. They could put related content on it and use it as tier-1 or tier-2 links. I only learned PHP a few months ago but I started scripting last week. I made a website where you can register your subdomain, enter text with links+anchors in between, your own header+alt, youtube video, and title+h1 text. I made this with one thing in the back of my head: make it as easy as possible to register for both humans and computers. The result is at DoFollowMe.info . Note that I'm not a designer though, so don't judge this site by its design.
I also bought a few 3-11 years old 2-letter-1-digit .org and .net domains at GoDaddy expired, which I will use in this concept too in case of positive receptions. All domains will be hosted on different subnets.
The advantage for me is to place some ads on it, for people who might visit the subdomains. Also, I added a basic filter that will look for adult keywords and adjust the ads on it.
It would be great if GSA would implement this website (and future network) into their software. It could be used to generate high quality content-related dofollow anchor-optimized independent backlinks for free, especially on the older to-be-added 3-character domains.