What is the current state of diagnosing and managing heparin-induced thrombocytopenia (HIT)?

References
Review - Arepally GM, Ortel TL. Clinical practice. Heparin-induced thrombocytopenia. N Engl J Med. 2006 Aug 24;355(8):809-17.
Guidelines - Warkentin TE. Treatment and prevention of heparin-induced thrombocytopenia: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines (8th Edition). Chest. 2008;133(6 Suppl): 340S-380S.