After a five year upgrade period, the Fermilab experiments CDF and DO are
taking high quality data in Run II of the Tevatron Collider. We report on the
start-up of both detectors and present a selection of first B physics results
from the Tevatron. We also compare different B hadron producers such as the
Y(4S) with the hadron collider environment and discuss general features of B
physics at a hadron collider.Comment: Posting for the archives: Invited review talk to appear in
proceedings of "Physics at LHC" Conference held in Prague 200