Yes, this is similar to my own previous question on the subject. I'm being very specific here though - despite having wrapped ad blocking with hosts file and firewall, some apps (several more now) are able to merrily display banner ads even when they are explicitly blocked from connecting to the net. My firewall (Droidwall) works, because if I block a legitimate app it gets blocked.
How are they doing this?? Is there some Google made common system process that they access?