The four-week compulsory break in F1 began after the race in Hungary and all racing teams are supposed to drop pen and PCs (not literally, of course) and cease communications with each other about any developments on their cars.
However as an F1 fan, this spells a long stint without any F1 races and some might be having withdrawal systems from our favourite sport. But fear not, there are some other motorsports/automobile events that can help "fill the void".
15 August 2010: 360 Motor Racing Club at Snetterton
14-15 August 2010: British F3/GT Championship at Silverstone
20 - 22 August 2010: http://www.wrc.com/calendar-and-rallies/2010/adac-rally-deutschland/overview/
Calender for whole of August 2010: http://www.autoblog.com/2010/08/01/event-alert-august-2010-calendar-of-automotive-events/
Hope that sustains you till the next F1 race in Spa-Francorchamps on 27 - 29 August!