I suppose that depends on what you consider to be unnatural acts. You will need to compile the dahdi_dummy kernel module (renamed from ztdummy). I was told that it wouldn't be necessary as long as I didn't need the MeetMe conference stuff. But I was not getting any audio without it.
It doesn't seem to consume lots of resources, but I don't get many phone calls or hits on my blog anyhow!
I am pretty new to the whole Asterisk thing, I think there are some guru's around Linode though if you have config problems. I compiled the 1.4 packages for asterisk and asterisk-addons. I also compiled the 2.1 versions of the dahdi-kernel and dahdi-tools packages. I did all of this on the 2.6.28-linode15 kernel.
I also wrote up a blog post about my experiences compiling the dahdi kernel modules. You might find it useful..
http://blog.pathennessy.org/2009/01/01/compiling-dahdi-modules-on-linode/
There is a newer post on there about configuring the Linksys SPA-3102. That might be some help as well. There seem to be plenty of resources online for this stuff.