Gallop News
Gallop News sources from Twitter and various email newsletter subscriptions, including BloodHorse Magazine, the Daily Racing Form, and the Paulick Report. The focus of the news content will be whatever is relevant to the current contest. RTTR News will focus on anything related to the Kentucky Derby, and RTTBC News will focus on anything related to the Breeders' Cup Dirt Divisions.
Resources
The providers listed below each offer coverage of horse racing. Most of them offer email subscriptions, notifications, etc.
RTTBC Resources
^Breeders' Cup Championship Series
RTTR Resources
More Resources
Equibase Virtual Stable
If you want to keep track of specific horses, trainers, jockeys, and tracks, then Equibase Virtual Stable is an ideal resource. You would need to create a free Equibase account for this then you can sign up for customized email alerts on when specific horses work out, are entered into a race, etc.