Comment Kahuna is useful for finding blogs on a specific niche but not for adding comments. The majority of sites it picks up are nofollow and of the very few that are actually useful there are other factors it misses out too. Like has already been mentioned a few times, simply Google for relevant sites and useful and relevant comments with your link manually and you will start to get word back.
It doesn't matter if you didn't spam or not, as I repeat - If enough people mark your comments as spam then your site will be thrown in the spam bin.
I have heeard about it first time from you guys. will try it out. then i could say hows it. thanks for lemtting me know bout this tool.
I've used this one before and admittedly it works well. However,I am like the others here,I am manually commenting.