I've never really considered ad-blocking a feature I needed to have on my iPhone, and after using AdBlocker, I still feel that way. That's not to say that AdBlocker is a bad jailbreak tweak, in fact it is excellent at some of what it does.
My point stems from the fact that ads just aren't that big of an issue on the iPhone. Honestly, when was the last time an advertisement on the iPhone seriously annoyed you?
In fact, the main place where I find ads that annoy me is in Cydia, but ironically enough, AdBlocker doesn't have an option to block ads in Cydia...