I'm looking forward to giving this a shot. Got my key today, so I have a couple of days before Vietnam comes out. Strange time to give out the key though...I would have played it more if they gave it to me sooner.
EDIT: OK, its pretty bad. As others said its more like Alpha. I had no issues with connecting, but lots of lag, resolution settings dont work. Mouse cursor sometimes going one way while crosshair going in the opposite direction. Its also really slow. Hard to tell the difference between walking and sprinting. RPG rockets have a huge falloff...wont go straight past maybe 30m. Its too bad they dont port the BF2 maps over to BFBC2. It was fun being on Karkland again, although its maybe 2/3 the size of what it originally was.