All the Sony models have VESA mounting patterns.

Sony did the same thing Samsung did on a few models, where they had the special studs that screwed into the TV and had M8/M6 screws that went into that. If the customer lost those studs that came in a bag with the TV, then good luck finding some more. They are not commonly available.

Here are 2 links I did find:
[Link: sony.encompass.com]
[Link: ebay.com]

[edit]
Just found these, in-stock and in the US. Better snatch them up quick:
[Link: ebay.com]