Welcome to ecomodder!
I think that hondaworkshop had good results with his Hot air intake on his 6th generation civic. I had good results with mine, but it's a 5th gen, so not *directly* applicable to your situation.
Oooh, before I forget (or someone else jumps in) get a scangauge or some other feedback device, it'll pay for itself VERY quickly.
If you're strapped for cash or just enjoy a good DIY project you might checkout the
Opengauge/MPGuino.