Some interesting things:
1) Very difficult to find the Full Tilt "Rake" page. I had to Google it because I couldn't find the direct link from their homepage.
http://www.fulltiltpoker.com/rake.php
2) The rake is actually higher at 2NL FR than at 50NL FR.
2NL works out to be 6.66 cents per $1.00 in the pot
50NL is only 5 cents per $1.00 in the pot.
Sure, the max rake is lower at 2NL. But pots at 2NL rarely get big enough to earn the full $2.00 max rake, anyway.