Yesterday Sdw has released a WIP version of PS3Vecx, a Vectrex PS3 emulator for the PlayStation 3 GameOS.
From the PS3Vecx ReadMe file:
DownloadThis is a port of the Vectrex emulator "vecx", by Valavan Manohararajah. Done using the PSL1GHT open SDK.
Navigate the menus with d-pad, cross to select.
D-pad : Vectrex Joystick
Square : Vectrex button 1
Triangle : Vectrex button 2
Cross : Vectrex button 3
Circle : Vectrex button 4
Start : Pause menu
Since I couldn't get directory browsing working in PSL1GHT, I precompiled the emulator with a selection of old calssic and new homebrew ROMs.
This is an early version, there is no sound support and probably some other bugs as well.