Dutchessy, you're right. I think about way to separate music discussing and lyrics discussing. It's hard, but plausible.
Anyway, why we have Tour and individual albums topics (which quite popular, by the way), but didn't have Songs topic? Kinda strange.
More of my thoughts:
1. Personally I never used AMIT like song meaning source before, though it seems to be the main place for discussing things like that. I go to songmeanings dot com instead and take nothing back, just couple of thoughts on couple of songs by somebody. I want amiters and my friends opinions, but I too shy to create another topic on another song, which will lost in deep thread of the main board anyway.
2. It's hard to use search, really. I tried it so many times with so many things, but never got the right result and it's time-consuming.
3. We discussed songs from Privateering, for example, but you can try to find this information in the main thread