Can you tell me if there is any extensive informationon the chemo drug avastin (bevacizumab).?

Yes. http://www.nlm.nih.gov/medlineplus/druginfo/meds/a607001.html.
Yes, there is. For a good source of information for patients, a good starting point is a website developed by the makers of avastin: http://www.Gene.Com/patients/medicines/avastin.