It's hard to get excited about a mere hotspot these days, but the Karma Go is something different. It's a $149 device that lets you pay for mobile internet access (on Sprint's LTE network) as you go for $14 per gigabyte, or get unlimited access for $50 a month. Right now it's also on sale for $99 if you sign up for an unlimited plan from the start. The kicker is that it shares your connection, so that others can hop onto your hotspot with their own Karma accounts. You'll get a bit of credit for everyone who joins your Karma Go, so there's an incentive for you to share. Now, the company is gearing up to begin next-day shipping for the Karma Go, just in time for last-minute holiday shopping.