I emailed Lennard a while back to ask him about the new releases, and here's what he had to say:
heya,
all the stuff on the kettel/secede collab album will be brand new, and the sound is gonna be quite different from leraine and such.
we're still sort of picking tracks and making/editing new ones..its a slow process since we're both kinda busy.
and yeah the track on my site is a sort of teaser..originally made for a new album which im working on as well
if all goes well it will probably surface somewhere early 2008
cheers!
len