Gamespy: Saga of Heroes / Out of the Box has a bit of a quick write up on Vanguard. The general verdict seems to be to wait a while before checking it out. In typical SOE fashion the game has been rushed out the door early, and has significant performance issues.
The problem with such a powerful graphics engine rendering a massive game world in real time is the hit you’ll take on performance. And no matter how great your system, you will have to turn off some of these wonderful graphics options in order to get the game running at a playable frame rate. The machine I tested the game on is a dual core 3.2 GHz Dell XPS 600 running two GeForce 6800 video cards in SLI. I tried running the game at my monitor’s native resolution 1900 x 1200, and I was barely getting five frames per second.
Sounds like Starwars Galaxies. Good too see they learned their lessons there. Some of the screenshots look stunning, however by the sounds of it they don't tell the story of 5fps which comes with them. Vanguard has a few items of game mechanics which sound attractive, but the news that the later levels become very unfriendly to the solo player is a bit disheartening.

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