Dashboard Confessional and New Found Glory are apparently working on a split together. Very little is confirmed so far, but the bands will be covering each others material, based on a Tweet from Chad Gilbert who said:

In the studio recording our Dashboard Confessional covers for our split 7 inch. Can't wait to hear the NFG songs that Dashboard covers. Waiting on the rough mixes of the 2 dashboard songs we covered.

Chad also posted some video of him performing guitars and that can be found here.