I'm looking to build a .NET reporting solution on top of an existing AS/400 system. Before I do so, I have a few questions I'd like cleared up so that I can get the most value out of the setup. What would be the best integration technology to use. Should i develop the system so that logic calls are performed in the mainframe or in the .NET layer? I don't have experience with this type of system, so any other suggestions are most welcome.