There is a program in the app market called x3watch that monitors everything on the phone and then sends out a monthly report to an email you choose. the bad part is that it doesn't block anything, it only works with the stock browser, and it can be turned on or off at will.
There is another program out called Covenent Eyes that is a content filter, but is still developing their android app. It will filter websites like you are looking for, but it is also a subscription based service.
Those are the only two I know of...