Three items (with a hat to MR for the Markets in Everything concept):

1. Slum tourism in Kenya:

Any journalist wanting a quick Africa poverty story can find it there in half an hour. And now at least one travel agency offers tours round Kenya's Kibera slum, one of Africa's largest.

"People are getting tired of the Maasai Mara and wildlife. No one is enlightening us about other issues. So I've come up with a new thing -- slum tours," enthused James Asudi, general manager of Kenyan-based Victoria Safaris.

2. GPS shoes:

MIAMI (AP) - Isaac Daniel calls the tiny Global Positioning System chip he's embedded into a line of sneakers "peace of mind." He wishes his 8-year-old son had been wearing them when he got a call from his school in 2002 saying the boy was missing. The worried father hopped a flight to Atlanta from New York where he had been on business to find the incident had been a miscommunication and his son was safe.

Days later, the engineer started working on a prototype of Quantum Satellite Technology, a line of $325 to $350 adult sneakers that hit shelves next month. It promises to locate the wearer anywhere in the world with the press of a button. A children's line will be out this summer.

3. Security lines in airports:

Some passengers at Atlanta's Hartsfield-Jackson International Airport could soon bypass others and breeze through special security checkpoints without so much as taking off their shoes. As long as they're willing to pay, that is.

Once an individual's security information is cleared by the Transportation Security Administration, that person can use the private security lines.