What Fonz said.
I'd say I prefer to be on top of the page - the higher the better (more chances surfer will spot your link and click on it first
) but I dont really give a shit. And I belive (and hope) no LL owner would decline site for placing his/her recip in wrong place (of course as long as recip is visible, above ENTER and whatsnot)
Personally I add links in random order (by hand) every time I build a free site and it works good for me.