AT&T will jettison wireless users that engage in P2P file-sharing over its network, the company said Friday in a letter PDF filed at the FCC. Senior lobbyist Robert Quinn answered a question posed at hearing last week by Republican FCC Commissioner Robert McDowell about the company’s policies of managing P2P network traffic on its broadband wireless platform.

Quinn said that AT&T’s terms of service (as well as the TOS for most other carriers) bars the use of P2P applications on the wireless platform. “Use of a P2P file sharing application would constitute a material breach of contract for which the user’s service could be terminated,” he said.

Because P2P file sharing applications typically engage in continuous (rather than bursty) transmissions at high data rates, a small number of users of P2P file sharing applications served by a particular cell site could severely degrade the service quality enjoyed by all customers served by that site.

AT&T hasn’t yet booted anybody off the network for using P2P, Quinn said.

At the Black Hat computer security conference in Las Vegas next week, researchers will demonstrate software they’ve developed that could steal online credentials from users of popular Web sites such as Facebook, eBay, and Google.

The attack relies on a new type of hybrid file that looks like different things to different programs. By placing these files on Web sites that allow users to upload their own images, the researchers can circumvent security systems and take over the accounts of Web surfers who use these sites.

“We’ve been able to come up with a Java applet that for all intents and purposes is an image,” said John Heasman, vice president of research at NGS Software.

They call this type of file a GIFAR, a contraction of GIF and JAR, the two file types that are mixed. At Black Hat, the researchers will show attendees how to create the GIFAR while omitting a few key details to prevent it from being used immediately in any widespread attack.

To the Web server, the file looks exactly like a .gif file, however a browser’s Java virtual machine will open it up as a Java Archive file and then run it as an applet. That gives the attacker an opportunity to run Java code in the victim’s browser. For its part, the browser treats this malicious applet as though it were written by the Web site’s developers.

After witnessing countless corparate attempts to patent common practices or trademark common terms, and seeing the resulting PR fallout, one would think that companies would just stop trying. Dell, however, seems to think that it should be able to trademark the term “cloud computing,” a phrase that entered the tech lexicon many years ago to describe software processing that takes place on a distributed network, such as the Internet.

The trademark application (serial number 77139082) was noted by Sam Johnston, a member of the Cloud Computing group on Google Groups, and mentioned on the Elastic Vapor blog.

Dell is not the only company to go after this term. The first trademark application was made in 1998 under serial number 75291765 by NetCentric Corporation, a company that used to provide “carrier-class Internet fax technology.” The application was killed less than a year later. Dell’s application is dated March 23, 2007, well after the first mention I was able to find of the term, which appeared as “cloud” and “cloud network” in the New York Times in 2001.

Toyota has developed a motorized stand-up-and-ride Segway lookalike designed to help people scoot around at malls and airports.

But the “Winglet,” shown Friday in Tokyo, takes some getting used to. A demonstrator was visibly worried about its safety while accompanying a reporter who cautiously tried it on a short course in a Toyota showroom.

Toyota officials insist anyone can learn to ride it with some practice, including the elderly - its major target buyer.

Still, Toyota Motor Corp. has no plans yet to turn the Winglet into a commercial product. The Japanese automaker will start testing the two-wheeler this year at an airport and resort complex and next year at a shopping mall, all in Japan, to get user feedback. Overseas test plans are undecided.

The Winglet goes up to 3.7 mph, about the same speed as pedestrians, far slower than 12.5-mph Segway, which costs $5,000. The Winglet can go about 3 miles before needing to be recharged.