The Mitsubishi TV gives a lot of options for you, which is the source of your confusion (maybe too many options).
For 3D in your TV - you need:
1. a compatible 3D source device.
2. Active Shutter 3D Glasses (not polarized like you get from the theater)
3. AND IF
the glasses are IR controlled or RF controlled you need the IR emitter or RF transmitter that controls the glasses. Neither of these are required if you get DLP Link glasses. YOUR CHOICE.
1. The Panasonic Blu-ray player is compatible already but you need to set the "3D Type" in the Panasonic setup menu to Checkerboard.
A. You must connect the Panasonic to a HDMI input on the TV.
B. However the PS3 and 360 are not compatible with TV unless you get the Mitsubishi Adapter - that is reason for the Adapter - to make most 3D source devices that are not already compatible work with the TV.
C. I do not believe the Wii is a 3D device anyway so that is no part of the 3D issue, just connect that to the TV using another input.
2. The Mitsubsihi adapter comes in two flavors:
A. 3DC-1000 - inlcudes Adapter with remote control and power supply, HDMI cable, 2 pair of IR controlled 3D glasses and IR emitter.
B. 3DA-1 - includes Adapter with remote contol and power supply and HDMI cable.
3. The Mitusbishi adatper has only one HDMI input so to use it for both the PS3 and 360 you need either a HDMI switcher to swap between the PS3 and the 360 or you need two adapters.
Your options for these are:
1. Get DLP Link glasses or IR Glasses WITH emitter or RF Glasses WITH transmitter and do 3D only from Panasonic Blu-ray player.
2. Do the above and get 3DA-1 and a switcher for PS3 and 360 (Panasonic would work the same). A switcher is only needed if you want 3D from both devices.
3. Get 3DC-1000 (without getting independent glasses) and switcher for PS3 and 360 (Panasonic would work the same). Again the switcher is needed only if you want 3D from both devices.
4. Do #1 above and get two 3DA-1 (one for each PS3 and 360).
5. Get one 3DC-1000 and one 3DA-1 - glasses come with the 3DC-1000.
Any HDMI High Speed cable is fine for 3D and many Standard HDMI cables are also OK.
As for getting the Adapter, I have heard that they are getting harder to find, so I would suggest you move fast.
This location on the Mitsubishi web site explains a lot.:http://www.mitsubishi-tv.com/feature/3DTV