Patients receive gemcitabine IV over 90 minutes on days 1 and 8, docetaxel IV over 1 hour on day 8, and filgrastim (G-CSF) subcutaneously (SC) on days 9-15 or pegfilgrastim SC on day 9 only. Courses repeat every 3 weeks in the absence of disease progression or unacceptable toxicity.