I posted on Andy Allens thread about adjustable levels, and a link to a web site that offers 59 different patterns you can fix tiles.
Tiling could be about to get more interesting, bet I won't be putting up 75 sq m per day of some of those patterns. I have done a couple of grand opus patterns recently, it's not funny lifting 900x600x25mm flagstones cos I put them in the wrong place.