XO Holdings reported Q2 revenue of $381.7 million compared to $383.6 million in the same period last year. Adjusted EBITDA (a non-GAAP financial measure) was $43.4 million in the second quarter of 2011, an increase of 7%, or $2.9 million over the year-ago period. Adjusted EBITDA as a percentage of revenue remained flat at 11% for the current quarter compared to the same quarter of 2010.Net loss for the second quarter 2011 was $10.1 million compared to $1.2 million for the year-ago period. XO's results for the second quarter of 2010 included net...