In summary: no, they're in CSS3; but it's all modular and might not be implemented at the same time. There is incentive for MS Grids to go forward soon, they'r

In summary: no, they're in CSS3; but it's all modular and might not be implemented at the same time. There is incentive for MS Grids to go forward soon, they're important to MS for use in Windows 8. Also, they're cool, or rather they're a sane layout scheme and it's awful that CSS hasn't had one up to now. The irony is that Firefox and Chrome will implement them at about the same time that they become official. But we won't be able to use them widely until IE7,8 and 9 have faded from the web. MS giveth, MS taketh away.