Thank you for writing.
Win7: Currently shipping
Win7 SP1 systems are shipping, but still seem to have the same bugs as previously reported, notably the focus issue. Win7 SP1 is available at any time as an upgrade for existing systems, or it can be shipped at no extra cost for new systems.
On Home Server, we only use it for the core OS, so there are no notable changes.
We're evaluating it right now, but there wouldn't be any new features if we were to switch over to WHS2. (With our mods, we never really did use WHS's core functions.)
MM4 is still under eval (they're revising their builds, up to build 2) - we see this as a work in progress at the moment, and we don't want to unnecessarily cause new problems by recommending an upgrade.
We work very closely with Arcsoft, and have decided that TMT5 is not yet ready for "prime time." It will likely be released along with the next gen of systems around summer time. Simultaneously, 3D BD may be supported with TMT5.
Hint: Post all your technical support questions on the forum to minimize response time, and so that everyone else can benefit from the answers. For pre-sales/sales questions for complete systems only, simply call us directly for the fastest response time - thank you!