The main objective of the study is to evaluate the safety and tolerability of six escalating doses of SCIO-469 in RA patients. SCIO-469 belongs to a new class of treatments that inhibit p38 kinase, a stimulatory modulator of pro-inflammatory factors including tumor necrosis factor-alpha (TNF-alpha), interleukin-1 (IL-1), and cyclooxygenase-2 (COX-2), all of which are known to contribute to both symptoms and disease progression in patients with Rheumatoid Arthritis.