In "An Itsy-Bitsy Problem," BW's Peter Elstrom interviews Tech and You columnist Stephen H. Wildstrom about the new Q1 from Samsung, the first product to incorporate a Microsoft-Intel design called the ultra-mobile PC. Its small, but it has two big drawbacks. One is a $1,099 price tag. The other is that its Windows XP software just doesnt work very well on its 7-inch widescreen display. For the UMPC to succeed, it will need software specifically designed to work on small displays