Maybedog you can sign up, free, for a virtual stable here to follow any horses of racing age.
http://www.trackmaster.com/products/harness/virtual_stable
You could also use the search option on the entries/results tab to find info about a specific horse.
As long as you know the registered name of a horse you can look them up on the USTA tattoo search. Even if their name was changed, you can still find them if you choose the current and prior name option. That won’t give you their full pedigree but it’s a start and many standardbreds are on all breeds.
When I’m looking for a pedigree, searching for the dam or second dam to try to find a sales page is helpful, and just about any stallion standing to the public will have a page with his pedigree and other info if the farm he’s standing at has a website. Many stallions are listed in the Stallion Showcase on USTA, which has the stallion’s pedigree and a lot of other info including breeding activity summary.