I had a subscription to Slipshine, but had to cancel it (oh joyous college expenses), and I was wondering if I were to resubscribe would I have to pay the first period fee again or just the rebilling? Thanks.

Yes, you do. For cases like this, I always suggest people go for the 6 or 12 month deals, since they waive that 1st-month-fee and are cheaper overall. They're pretty much intended for people who know the site enough to know they'd like to subscribe that long.