When will Windows 7 be officialy supported a either a Guest or a Host to VMWare Workstation? They added support for Windows Server 2008 very early (it was tagged as beta for a while) but i've seen no sign for Windows 7?
First off, no VMware employee will/can answer this question (and they'd be the only ones who know).
However, I can tell you historically -- Official Support will only happen once the OS is released. You may see "experimental" support earlier, at least for guests, but I've not seen/heard anything about new versions of Workstation, etc., yet.