Their Rise and Fall of Ruby Woo album contains several covers and standards but there was one in particular that sounded familiar but I couldn't quite place it. It turned out to be Could It Be Magic by Barry Manilow. I found this video on YouTube and it's kind of crappy quality but the performance is wonderful. I was also impressed that they actually play instruments!
The Puppini Sisters are working on their third album, reportedly of all original songs. They recently performed at the Glastonbury Festival on June 27, 2009.