You know you're a egocentric programmer when it doesn't take long at all of searching through the net for your app of choice before you decide to just write it yourself. Or maybe that's an enterprising programmer? Or an obsessed programmer? Either way.
I couldn't find any good free line counters out there that were easy to use, so I made this one. Just drag files (as many as you want) onto it. It still can't handle recursion, so I'd advise doing a search for whatever you want and just selecting all the results and dragging them onto this one window - it'll spit out the number of line feeds, in PC, Mac, Unix, and total.