Any information on NVIDIA 300 series?

Unless the 300 series is a lot better/different then the 200, I'd upgrade now. When we get a few 300 cards, they will all be high end, and cost a bunch. Nvidia lately hasn't done a good job of getting the newer cards down into the lower end. Grab a GTX275 now, and then upgrade again to a 300 card 12-15 months from now when/if they finally do ship out a midrange part.

VRAM 1GB-2GB?

Don't expect a quantum leap but expect more of the way Nvidia conducts business, re-branding, add a few more shaders, raise/lower GPU cores/memory speeds - it's all towards market segmentation and they want a piece of the action on every level. When the 300 series finally arrive, it'll be the Bugatti Veyron or the Ferrari Enzo of the GPU world BUT in 12 months it becomes a mid range card!

How much better will it be than the GTX 295? A realistic guess for me would be a maximum of 8 percent performance gain (10% is just wishful thinking).

Instead of market hype about the latest and greatest because it's now GDDR 4 or with more SPs, I'd rather see NVidia make all their entry level and mid range cards "cheap dual-GPUs built in SLI on one PCB" by using, for example two old G80 or G84 chips. They'd save huge on the R&D and still come out with very competive products.

Well we'll just have to see how the ATi 49xx series pan out.

something better than the 4890 on 40nm = past 1.1ghz clock speed and probably something that beats crysis.

Im pretty sure that all the 300's will be DX11 compatible, considering I heard that in PC Gamer Magazine they are releasing a DX11 compatible 300GT