My original intent wasn't to provide a "let's get together to play" concept but rather a resource where GMs and players could meet and plan a run that could take place on or off of the board.
For example, I currently have an idea for a run where a AAA megacorp is smuggling north polar ice south in huge refridgerated tanker ships for some nefarious purpose. However, I dont' have much more than that. So I could post the seed and we would see, with the help of the minds (twisted and otherwise) of the DSF'ers where that idea could go.
Basically, my reason was this: I've found that when I try to plan a real-world game (as opposed to one on the boards) I have trouble seeing the different angles because I have eight players. So they'll almost inevitably see something that I didn't just be virtue of there being more of them than I. However, if I could have a resource where I could tap into the brains of many other GMs and players, it would be a way to cut down on the angles that we didn't see.
You're right, this kind of stuff already happens in the Shadowrun forum, however, the posts on this type of thing are few and far between (unless I miss some of them). Plus, they're intermixed with the other more regular threads (Can I Dikote my Ally Spirit?) and are therefore harder to find. Putting threads on run planning in their own forum would provide a neat and tidy place for them and it would be a storing house, therefore, for run ideas, hooks, and campaigns for other GMs to benefit from.
Phew ... long post. Anyway, it was just an idea. If this all stays in the Shadowrun forum, just as good to me as this new idea. Just thought I'd toss it into the ring and see if it lasts a few rounds