Surgery is a viable option and new methods are found regularly.
http://www.erlanger.org/e/spring_2004/aneurysms_the_f.asp
Treatment
Surgery is a time-tested and effective way to treat most brain aneurysms. Many advances over the last two decades have made surgical treatment better and safer. The operating microscope, for example, now allows neurosurgeons to magnify the blood vessel with an aneurysm from the size of a pencil lead to the size of a water hose! Better anesthesia and nursing care have also improved the surgical approach.
Despite the advances, surgery has not been an option for some aneurysms until recent years. Fortunately, a new treatment has been developed to combat even these inoperable lesions. Along with specialized radiologists, neurosurgeons can now go inside the aneurysm and fill the bubble with tiny coils of platinum wire, packing it so tightly that bleeding is prevented. Newer coils may even help the body to heal the weak spot in the artery wall.
http://abclocal.go.com/wls/health/022202_hs_aneurysmrepair.html