It's up now on Cydia (ModMyi repo), it's a new package called NoAccessorySplash iOS4 so you won't get any update notification in Cydia if you have the old 3.0 version installed. It should automatically remove the old 3.0 version upon installation.
There is now an SBSettings toggle included in the package as there have been a few requests for that
Please let me know how you all get on
Very nice! I will look into this for my brothers car.
You sir are awesome.