The pursuit of protein seems like a common refrain in this discussion. I hear it a lot... We were all told in school how important protein was.
A few sites worth checking out... Mostly reinforcing that the common perception of protein is pretty misguided, and that getting "enough" is quite easy, even for plant based dieters:
Nutrition for Everyone: Basics: Protein | DNPAO | CDC
Tips for Vegetarians
Trying to stick with mainstream sources here, for obvious reasons.