The terms and conditions page is still up: http://www.bbc.co.uk/writersroom/opportunities/class-dismissed-sketch-writing-initiative/terms-and-conditions
Yeah, saw that Nick Writing program. I think being on a mailing list or social netowrk thing for that is how I found out about the Script First thing. Does look cool (and interesting that they want you to write an adult-focussed sitcom despite being a kids channel) but must be SO competitive.
I wanted to try to write my own original sitcom first. The consensus from the few writers I know seemed to be that it's better to have an original script in the UK, and a script of an existing series in the US. Thought I'd start with my original idea first, in time for sitcommission (missed Rocliffe and writersroom due to other work) and then work towards the Nick thing in the 2nd half of the year.