Thank goodness Arsenal recovered, especially thanks to Walcott. Barca's two goals were horrible, Almunia and Song to blame, but with the number of chances they created, particularly in the first twenty minutes or so, you can't quite begrudge them that.
Being two possession based teams, I thought it would come down to whoever was able to maintain possession and that was Barca. But thanks to some terrific saves from Almunia and some terrible Barca finishing, the Gunners were able to level it up and go into the second leg with a fighting chance.
Arsenal have to worry about injuries now. Losing Fabregas, Arshavin, and Gallas(supposedly out for the season) for potentially long stretches is going to be a big blow to both Champions League and EPL chances. But with both of Barca's first choice CBs out for the return leg, Arsenal have a chance to outscore Barca even at the Nou Camp. Advantage Barca though.