I think Oakland wiki would actually be an ideal place to do something like this. My thinking is that any place that receives city funding (particularly programs that serve young people) should be evaluated for their effectiveness every year they go up for funding or grant renewal AND the evaluators should be young people. It should be simple; rating of 1-5, details about service, what you need to participate (do you need a referral, is it walk in?), what you went for and if they were helpful/if their needs were met and then some checks and balances that reflect if they fullfilling contract req'ments.
The data exist, it is about how it is disaggregated; Race/ethnicity, gender, geography and offense. This is the way data for juveniles (and even adults) offenders should be presented. Alameda Co does not do this. There are folks that are working on getting counties to present their data this way as well as make it public, in an effort to look at the racial disparities. Check out the Burns Institute: www.burnsinstitute.org