Jonesing for more wireless USB options in your laptop? Dell's got you covered with extended availability of the $145 add-on in its XPS M1530 (plus its Gaming Edition), Inspiron 1525, which brings the tally to those and the 17-inch Inspiron 1720 and 13-inch M1330. Still out of the wireless USB loop: the low end 14-inch 1420, the XPS M1730, and the juggernaut M2010 (which really should have it by now).