I guess this should work (hopefully can test that next week). But earlier models (CECHG and older) do have 256MB flash (16MB bootloader, 240MB OS-Filesystem) while later models have only 16MB flash for the bootloader, the OS-Filesystem is stored on internal HD. Whenever the log is stored inside this OS-Filesystem (e.g. once on shutdown) the newer models would swap that also away but older models were out of luck here. Maybe one of the devs can answer that.
That's the best way but be a bit inconvenient if we once can use our PS3's as a full fledged homebrew media (vdr-client, XBMC, MAME etc.) and gaming center. Second hand price will rise and keeping two boxes is a waste of space and an annoying permanent re-connecting of BT controllers. Hopefully xcellerator's stealth technique for backup managers and homebrews will work so HD swapping is not (but still remove PSJB stick and unplug ethernet cable will remain) necessary.