iRobot has new Roombas, but it doesn't sound confident it'll be around to sell them

iRobot, the creator of the Roomba and the company that popularized robot vacuums in the first place, told investors on Wednesday that it has "substantial doubt about [its] ability to continue." Beyond declining sales -- the company reported that revenue decreased 47 percent in the US over the prior year in its fourth quarter earnings -- iRobot is also struggling to pay off its debts. The company took on a $200 million bridge loan to stay afloat while it waited for its $1.7 billion acquisition de...