NTML authentication not supported in Andriod

Recently i was leading a project where we had to develop a IPhone, Black Berry and Andriod compatible web application which could be configured to use windows authentication. The problem we ran into was that the application won't run on andriod with windows authentication, after searching for solution i found the following link which made it clear that andriod didn't support NTLM authentication at the moment and is working on its solution but there is not time line provided as to when we could expect the solution to be out in the market.


http://code.google.com/p/android/issues/detail?id=4962

Microsoft.Jet.OLEDB.4.0 not supported in 64 bit

I had a run in with this problem. we were using Jet 4.0 driver to import data from excel files in our application. we decided to make our application 64 bit compatible and after converting it to 64 bit what we find is that our data import functionality stops working and what makes it really irritating is that Microsoft didn't properly communicated that it was going to stop supporting this driver on 64 bit OS.
following are the links that you might find useful:
http://social.msdn.microsoft.com/Forums/en/adodotnetdataproviders/thread/d5b29496-d6a1-4ecf-b1a4-5550d80b84b6