Have you been able to quantify your results?
I did another big round of blog creation. I tried to create blogs on 3,567 WPMu hosts. LFE was able to create blogs on 1,790 of them. Of those, it was able to actually post on 607.
That's about 50 cents per WPMu host.
Unfortunately, I am seeing a lot of my blogs get deleted after a few days.
Overall, I must say that this program is very addictive.