This about-to-be released MiFi card really looks cool.  You can carry your own wireless cloud with you and share it with up to four other users. There are lots of very interesting possibilities, including, as one poster noted, saving a lot of money if you exhibit at trade shows where they charge through the nose for Internet access.

Here's David Pogue's review.

Here's his CNBC interview.

Release date is May 17,  2009.