More details are emerging about the Lotus Foundations appliance. The Boston Globe Business Team lists a price of USD$3,348 for the appliance (including a server licence and five user licences). They may be right about the price and also right about the December availability of the product, but I'm not so sure of their prediction of the inclusion of VMWare in the released product.
In my recent discussions with Lotus HQ the People-Who-Would-Know were predicting a Q1 release for that functionality. By all means buy your Foundations appliance next month, but you might be waiting until 2009 before you can start retiring your Windows servers.