I think autosport.com’s online deal is quite good value as it also gives access to additional editorials. I always forget I get a digital version of the autosport magazine included in whatever package I picked until a couple of days as well until it comes around :p
For rumors (not necessarily accurate), I use F1SA.com. But a reliable alternative to Autosport is italiaracing.net, which, despite the language barrier (which may be overcome with Google Translate), provides fantastic coverage of the junior formulae (they were the first to report the Bianchi-Tech1 deal).
I alwas go on the autosport forums on practice or quali days to see the pictures of the cars’ updates, the car threads are good at getting the latset pictures up really quickly. I never post there, but like I say it’s a good place to see the updates. – I was shocked when I saw the latest MP4-27 sidepods last Thursday as the team’s set up the garages.
GPUpdate, F1Fanatic, and Autosport are my main stops for news. I like JA on F1 for in-depth articles – he’s a much better analyst/journalist than commentator! SpeedTV sometimes has some interesting articles. PlanetF1 is OK, except for the YouTube style comments on whether Hamilton is faster than Alonso that plague practically every single article.