This looks like a great double-bill, happening this Friday, July 16 at Middle East upstairs. I first heard Ha Ha Tonka from their live sessions on the most excellent HearYa blog. I later saw them play at the most excellent Bloodshot BBQ at Middle East last summer. They are most excellent. You should go see them!
Below is a video from HearYa Live Session #50
Ha Ha Tonka - "Walking On The Devil's Backbone" - HearYa Live Session 5/3/09 from HearYa.com on Vimeo.
Also check out these Live Sessions:The boys can bring the rock, but be prepared if they gather around the mike and sing "acapella-ly". Their version of "Hangman" in Live Session #8 is amazing and even more so live.
If you're on the Cape this weekend, you can catch them at The Beachcomber in Wellfleet.