Success! My patch for building Daemonlogger as a native OpenWRT package has been accepted into the mainline distribution and committed to trunk. Pre-built binary packages are now available for all supported architectures in the nightly snapshots tree. You'll find the appropriate .ipk for Kenny (a WRT150N) and similar Broadcom-based routers here.
Unfortunately these packages only work on the latest trunk firmware builds at the moment, and the 3.2 kernel along with the extra software included in these builds does not leave enough free JFFS space or usable RAM to run daemonlogger effectively. I'm trying to convince the developers to include this in the next stable release (Backfire 10.03.2) based on the 2.6 kernel, but no luck yet.
For the time being you can still grab my binary packages here from my GitHub repository. These *do* install and run cleanly on the current stable version (Backfire 10.03.1). For most Broadcom-based WRT-type devices, you'll want the brcm47xx build.
UPDATE: Binary daemonlogger .ipk packages for ALL OpenWRT-supported embedded devices and platforms are now available here: http://bit.ly/dl-owrt