I am a pretty avid fan of F1 even though the FIA seems to always be trying their best to mess things up.
See below for useful links to keep up to date with the world of Formula 1.
F1-Live has very up to date information. Looking for new developments through winter, F1-Live had good data up very quickly about the latest news and car developments in F1.
There are a few good sites available that provide top F1 information for free. There seems to be a lot of duplication across the sites.