Either a squeeze page theme or just a plugin that pops up a box for visitors to subscribe to when they first enter the site. What is the best free option? Thanks!
try this http://wordpress.org/extend/plugins/wp-super-popup/ put your aweber or other optin form code inside. since its free not that much fancy,wpsubsriber works well (paid)
WP Optins is an amzing plugin for FREE! It adds a hold load of extra editing options to the page editor and is really easy to use. It also comes with a video tutorial. I have been a user of Optimize press for a long while which is a PAID them and WP Optins is easily as good. You can have a squeeze page online in 15 mins or less! You can find it at wpoptins.info
check this one on wordpress.org too http://wordpress.org/extend/plugins/wp-lead-plus-free-squeeze-pages-creator/
Don't forget to add http://squeezepageengine.com to the list, BUT it's not free, but with the premium graphics and ease of content creation i'd say it's worth it!