I especially like the tiled approach to data streaming that Polymaps implements, though I wonder if it's inefficient if you have really large polygons and a sma

I especially like the tiled approach to data streaming that Polymaps implements, though I wonder if it's inefficient if you have really large polygons and a small grid (I'm assuming that if a polygon intersects the grid it'll be streamed rather than being chopped up). Get ready for all these client side 2D mapping libraries to get a big speed bump with the onset of HW-accelerated Canvas/SVG rendering. The online mapping world currently dependent on tiling to get literally anything done. It would be nice to see some variety. Maybe the ability to handle more data faster will spur innovation in lightweight GIS data messaging formats.