As far as interesting cases goes, there were certainly two that stand out. First was a middle aged man with rheumatoid arthritis who developed fulminant sepsis / septic arthritides (that's right, polyarticular septic joints) and an abdomen full of abscess all due to immunosuppressive therapy with immunomodulators. The second interesting case was a gentleman who arrived in the ED with very labile blood pressures and a remote history of heart disease. He developed respiratory failure with subsequent failure to wean and was finally diagnosed with FSGS with concommitant HCV infection. Those two cases pretty much take the cake as far as zebras go.
I'm still waiting on my first pheo...It's bound to show up one of these days.