Is there a filter in AE that you can apply to footage to make it look like FILM?

there are tricks within after effects to give you that film look.

http://www.dvinfo.net/articles/filmlook/broadway1.php

you can also check out demos of the following plugins

red giant's magic bullet

http://www.redgiantsoftware.com/magbulsuit.html

digieffects cinelook, cinemotion

http://www.digieffects.com/frames/cinelook/cinelook.html

tender box 3 ( you can just use the deinterlacer in this, it's
supposed to be the best deinterlacer )

http://shop.store.yahoo.com/toolfarm/4463.html

bigfx's film fx

http://www.zenvideo.co.uk/big_fx.htm

grain surgery

http://www.visinf.com/gs/ae/

this is a free plugin i haven't tried it yet

http://www.forgedimages.com/filmlookPlugIns.html