Advice or feedback for a new acoustic cover band

Hi,

Our band just played its 3rd gig, our first full length set. The idea is to have some fun playing mostly our favourite classic rock songs with a bit of a twist, but hopefully so that other people enjoy it too. We uploaded some songs to youtube and would welcome any constructive criticism about any aspect of what you see and hear.
Here's the channel link:
http://www.youtube.com/SfactionBandi
Cheers!