I've seen similar efforts like the AdBlock Browser and Atomic Web Browser, and I hope ABP for iOS will support this more flexible filter system as opposed to just the domain-based filtering of the others; unfortunately ABP for iOS will not be able to avail itself of Safari's faster Javascript engine.
BTW this new app, like all iOS apps, works great together with Weblock, a service to manage a custom PAC file to block ads in apps (but that works only on Wi-Fi, not cellular connections).
There's a buzzin' in my brain I really can't explain; I think about it before they make me go to bed.
We have not started developing a solution for iOS but we do plan to focus more on mobile due to the growing demand. Anyway, all versions of Adblock Plus support the same filter syntax so an iOS version would also have those capabilities.