Unless you've been in one of a few key test markets, you've been pretty much out of luck boosting your AT&T signal in the comfortable confines of your home since the 3G MicroCell first launched -- until now. Starting in the middle of next month in a deployment that spans "several" months, customers across the country should expect to see MicroCells pop up in their local regions. The device itself will run a one-time fee of $149.99 before a $100 mail-in rebate (when purchased with a "3G MicroCell calling plan," though we don't yet know what that constitutes). Separately, there'll be a $19.99 plan bolt-on that offers unlimited calling when connected to the device -- and anyone tacking