We just put out a new beta:
Beta v2.03Hopefully USB and NMEA are solid now, and we've added the ability to turn on/off tilesets for both display and batch download.
I was getting sick of the Topo 8M and 32M GIFs, which although they have better quality than the jpeg 16M and 64M, are slower to decode, which results in slower panning and zooming.
It makes the batch download more useful now too--if you only want a particular tileset, for example.
