The Chicago and Boston metro areas have shown <A HREF="http://www.eweek.com/article2/0,1895,1987313,00.asp?kc=ewnws071206dtx1k0000599">the biggest gains in IT job postings</A> since the beginning of 2006, according to the monthly report released July 11 from Dice.com, a career site for tech professionals. Chicago and Boston have increased their number of tech jobs available 26.6 percent and 35.4 percent respectively since January, and 116 and 274 new jobs respectively since June.