<strong><span class="subhead">Black Friday plan</span></strong></p><p>Wal-Mart Stores Inc. said Wednesday it will keep its stores open 24 hours and take new crowd-control measures Thanksgiving weekend after a temporary employee was trampled to death in a Black Friday rush last year. The world&rsquo;s largest retailer says day-after-Thanksgiving sales will begin at 5 a.m. Nov. 27, but most U.S. stores will be open 24 hours to prevent a mad dash. The announcement doesn&rsquo;t affect most of Wal-Mart&rsquo;s Supercenters, which are already open 24 hours.</p><p><strong><span class="subhead">Delta goes cashless</span></strong></p><p>Delta Air Lines will soon tell its domestic passengers in flight that their cash is no longer welcome there. Atlanta-based Delta said it will accept only credit cards for on-board food and alcoholic drink purchases starting Dec. 1 on North America flights operated by Delta and its merger partner Northwest.</p><p> There are some exceptions: Delta will still take cash and credit on international flights; and it does not accept credit cards on Delta Connection flights on its regional carrier partners such as Atlantic Southeast Airlines.</p><p><strong><span class="subhead">IBM software</span></strong></p><p>IBM Corp. is introducing mobile software for retailers today to capitalize on the growing popularity of smart phones. The software will help stores format their Web sites, making them easier to view on mobile phones and work with all devices, said Errol Denger, the program&rsquo;s strategy director.</p><p><strong><span class="subhead">It&rsquo;s a free concert</span></strong></p><p>A new Web site allows music lovers to watch concerts for free online, choosing from five camera angles as they watch.</p><p>Billboard-Live.com says its new concert-viewing Web site offers visitors different perspectives on performances by Alicia Keys, Usher, David Archuleta, Daughtry and other artists.</p><p>Music fans can select from five different views as they take in full concerts by these artists, focusing solely on the drummer or guitarist if they choose.</p><p><strong><span class="subhead">Flap over Pfizer research results</span></strong></p><p>Analysis of a dozen studies testing possible new uses for a Pfizer Inc. epilepsy drug found the published results were often fudged, indicating the medicine worked better than internal company documents showed. The report said that when a company-funded study&rsquo;s primary finding wasn&rsquo;t favorable, the study authors usually buried that result and found something else positive to highlight, without disclosing the switch.</p><p> Documents used in the review were obtained by lawyers suing Pfizer for refunds on prescriptions paid for by insurers and consumers. The lawyers, who are seeking class-action status for the cases, claim Pfizer concealed evidence the epilepsy drug Neurontin didn&rsquo;t work for those unapproved uses, including nerve pain, migraines and bipolar disorder.