As suggested already, I suggest you check the City of Oakland Crimespotting: http://gismaps.oaklandnet.com/crimewatch
Also, check in with the City Council Office there..they'll have lots of info. Larry Reid is the Council person for Council District 7. His office will have the name of neighborhood groups and key people you could speak to.
If you want to go to a neighborhood meeting and see what people are saying, check out the neighborhoods. http://www2.oaklandnet.com
I sold a house on the 2700 block of 75th Ave. last year and the buyers are very happy. They are first time buyers, have made sure their home is secure, are involved in the community there, but have had no problems.
In general, this area has had a fairly high rate of crime over the years, and it is known for this. Having said that, there are people living there who own homes, raise families, go to school, operate businesses, and this is their home. A significant amount of redevelopment funds have gone into the area in recent years, and it shows. Eastmont Mall is much improved. Check it out carefully, talk to neighbors on the block you are interested in, and do as much research as you can. Good luck.