I am giving up on blog search engines because their search result quality has dropped drastically in the past couple of months, thanks to blog spammers.
Blog spammers are using backlinking, name droping, ping spamming, comment spamming, post ripping, tag spamming, content obfuscating, and what ever means they can think of to give their contents, ads, some eyeball time. The funny thing is, they are still not being as sleazy as can be because spammer contents and links are still mostly honest. It won't be long before this age of spammer innocence passes.
Until much better solutions are hatched and delivered, I'll just hang up my blog searching hat on the rack. Til then, thanks for all the fish.