bsharma writes to let us know about a little goodie that we will be able to buy starting May 17: a battery-powered, rechargeable, cellular, Wi-Fi hot spot that you can put in your pocket. "What if you had a personal Wi-Fi bubble, a private hot spot, that followed you everywhere you go? Incredibly, there is such a thing. It's the Novatel MiFi 2200, available from Verizon starting in mid-May ($100 with two-year contract, after rebate). It's a little wisp of a thing, like a triple-thick credit card. It has one power button, one status light and a swappable battery that looks like the one in a cellphone. When you turn on your MiFi and wait 30 seconds, it provides a personal, portable, powerful, password-protected wireless hot spot. ... If you just want to do e-mail and the Web, you pay $40 a month for the service (250 megabytes of data transfer, 10 cents a megabyte above that). If you watch videos and shuttle a lot of big files, opt for the $60 plan (5 gigabytes). And if you don't travel incessantly, the best deal may be the one-day pass: $15 for 24 hours, only when you need it. In that case, the MiFi itself costs $270." The device has its Wi-Fi password printed on the bottom, so you can invite someone to join your network simply by showing it to them.