Recent experimental and analytical results regarding forced convection boiling on small regions are reviewed, discussed and compared. Similarities and differences are noted, giving plausible explanations and identifying regions for further investigation. This boiling situation shows unique features throughout the boiling curve that separate it from flow boiling behavior on larger surfaces. These features are best described in terms of boundary layers. Certain issues remain unresolved. One is the high incipient superheat values visible with very short heated lengths. Another is the role of substrate conduction on CHF behavior.