Deepak,

I'm not going to disagree with. Hopefully you should see some improvements in the very near future. Better browsing by subject should be in place in a matter of weeks. Feeds by subject are high on our priority list too.

I like the idea of displaying paper and comments adjacent to one another. That was something that was in the design of the PLoS ONE site originally but ended up on the cutting room floor in order to get at least the bare bones launched before the end of 2006. Time to think about including it in 'The Director's Cut'