I need some cute and easy patterns for knitting children's hats.  Any online sources?

Thanks!

L, if you're not in a major hurry, check out Ravelry.com.  It's an online knit and crochet community and it's a phenomenal resource. 

The site is beta testing, so you have to ask for an invitation to join, but apparently the only reason for that is so they can control the influx of new members.  According to the website right now, if you request an invitation, you should have one in two days. 

Ravelry has a huge searchable database of patterns, many of which are free, plus a huge database of yarn, informative forums and a generally friendly online community.  I've learned a ton there - I can't recommend it more highly. 

Knitting Pattern Central has a bunch:

http://www.knittingpatterncentral.com/directory/hats_childrens.php

Google free knitting patterns.  A lot will come up.

try Lion Brand yarn.com for free patterns,  How's the weather in Portland?  I am a transplanted Oregonian living in Ohio, cold and icy here. ha ha

The Knitting  Pattern Central that Linda mentioned beats any other site I have looked at.  Oddles of hat patterns.  Thanks Linda.