2. Patients must be greater than or equal to 4 weeks from cytotoxic chemotherapy, except greater than or equal to 6 weeks for mitomycin C or nitrosoureas, and greater than or equal to 8 weeks from prior UCN01; greater than or equal to 4 weeks from monoclonal antibody therapy (cetuximab, bevacizumab); greater than or equal to 4 weeks from prior experimental therapy; greater than or equal 2 weeks from radiation or hormonal therapy; greater than or equal to 2 weeks from sorafenib, sunitinib or temsirolimus treatment. Patients with prostate cancer may continue ongoing LhRH agonist therapy. Patients with bone metastases or hypercalcemia who began intravenous bisphosphonate treatment prior to study entry may continue this treatment while on study.