A single arm Phase 2 trial with the study drug temozolomide (temodar) for newly diagnosed glioblastoma in elderly patients (defined as greater than or equal to 70 years old). Following surgical resection, and confirmation of glioblastoma, patients will proceed to primary chemotherapy with temozolomide (temodar). Temodar is given for 42 consecutive days on and 14 days off occurring every 56 days.