Well, i won´t promise this for the 1.9.4, since it must be well tested before release it and we have a little emergency situation with this problem with the Address Book Only option.
But it will be done soon as i promised
About the 3G and 2.0 + AppStore.
We all know how Apple is. So now they entered on the applications distribution scheme, and partially abled developers to make some app´s.
Well, Apple likes to say what you can and what you can´t do, and this is not different on their iPhone and SDK.
So they let developers use just a few frameworks (libraries) on their unhacked SDK. This put a big limit to what an app can do and what it can´t, and unfortunately, mess with calls and sms´s is on the CAN´T list

Yes, we can hack the SDK and use all frameworks on development, but this violates the Apple Agreement when using the SDK (of course). So Apple will not sanction the software to be present on AppStore. So i´m pretty sure there won´t be any call and sms filter app for the 2.0 now.
Let´s wait for the good jailbreak from dev team and use Installer instead.