It's pretty! Doesn't do much yet, but you can move and place a bunch of different terrain types and items, you can even dig tunnels, and the voxel rendering is nice.
1) I got it through the kickstarter campaign with is over but you can still pledge for Alpha access up to the end of the month via http://nerdkingdom.com/ or for Beta (which they estimate to be January next year).
2) Currently not officially (see http://nerdkingdom.com/administrators/mod/nerds/f/27/p/580/7234.aspx#7234) it might be possible to make it work but I wouldn't count on it.