The design is good enough. have to agree with you. i feel its too crowded. and puting some ads will be much more better to fix it (i think)
I agree with wrymkin and etsuser. There's a lot to distract the eye on your blog. It does look cool, but just too busy. Move your tag cloud in the right hand column down to the bottom, and put some adsense ads where the tag cloud currently is. I don't think you really need the calendar in the right hand column, either. Your blog's subheading is hard to read against the background. You might want to do something about that. Try making it white or gray instead of black.