In a recent post over at the MSN Search Blog named Beta Ramp-Up, Oshoma Momoh, General Manager, MSN Search Program Management tells us that MSN will "begin turning up the dial and direct more of our users to the Beta." Some have been reporting MSN Beta results on the main MSN Search site (currently powered by Inktomi). Soon you will see many more reporting such occurrences, the complete switch from Ink results to MSN's results is unknown at the moment. Oshoma says, "You’ll continue to see us doing this on occasion for the forseeable future. As before, the service remains in beta status and we will officially launch it when it’s ready."
This is being discussed at WebmasterWorld.