http://www.autosport.com/news/report.php/id/92602
Basically if you sit out Q3, you start on the set you set your fastest time in Q2 with.
Intresting. But id limit the teams to 5 sets of tyres for Quali and the race, 3 option and 2 prime. One set of new prime and options must be kept for the race. Meaning that top teams will have to run on a set of primes for Q1 just to make it, and sometimes in Q2 as well.
Also would mean that Red Bulls sitting in the garrage in a "too cool for school" manner in Quali would be gone as you could have Saubers, Williams, STRs and Force India cars setting times in Q2 that put them P1 on options just to get them thrugh.
Then you start on the tyres you set the fastest time on, for the Q3 guys, and then the Q2 and downward guys who have a new set of tires can gain a better advantage in the first phase of the race.
Also means that more 3 stop strategies become more the norm for the Q2 guys. as this could just be faster on some tracks.
However Pirelli need to get a consistant 1.2 to 1.5 second a lap step between all their tyre compounds first i think.