I have just pushed a new version of the Grid format online that I recommend all users update to. I do want to take this moment to remind users that the Grid format has been listed as a "release candidate" meaning there are still a couple of bugs to be worked out. If you wish to use Grid (and I hope you do) please make sure you get the latest patches as they are released to increase stability.
The good news is that we are now in RC2 with a huge bunch of fixes and updates.
Due to popular dmand the format now uses Variable width. In english this means it will fit as many blocks to the page horizontally as your theme allows. So those with wide themes may now find 4 ro even 5 grid items per row. It also means if you dock blocks, the grid now extends to fill the space where it can.
The block sizes are still set in stone. I am investigating ways to allow an admin to overide the grid item sizes but that is still a work in progress I'm afraid.
Translations into Russian and Spanish are also now added.
A major thankyou must go out to Pavel Timoshenko who contributed a large bulk of the update as well as Tim Lock.
Try and keep feedback to this thread if we can..or even better, add your items to the Moodle Tracker ( http://tracker.moodle.org/browse/CONTRIB/component/11231 ) so we can keep a better eye on what needs fixing.