As always, the EIA site is an invaluable resource for snapshotting inventory, futures and spot pricing. I've highlighted some relevant snapshots below, but for more information you can also visit http://ir.eia.gov/ this will allow you to reference any of the weekly/daily inventory reports (weeklys are published every Wednesday)
Here are the majors:
The weekly inventory report on US and PADD1 Crude is:
Heres a snapshot of spot pricing this week: