Here's the link to join Swagbucks if you're interested: clicky
It includes my referral info, which of course I'd be more than happy if you used. Their referral system is sort of unusual. I don't actually get any bonus just for someone joining and using the site. Instead, each time they get points through using the search engine, I get a bonus too. I guess the idea is for people to encourage refer'ees to continue to actually use the site since you only get points whenever they do. It's certainly smarter than simply giving a lump sum for anyone who joins since I'm sure there are people out there who would abuse the system by creating tons of fake email addresses and the like.
When I joined, there was also a signup bonus code which I'm told was still working as of a day ago. Just type in 'HelpJapan' when you sign up through the link and it should give you 80 free points to start instead of whatever the generic amount is. That will put you a little more than 1/6th of the way to your first $5 gift cert right off the bat. That's not to say you have to get amazon certificates. Those are just what I find most useful. There are gift certificates to tons of other sites and stores and you can even get $5 through paypal which is pretty much just cash. There are also various lotteries where you can buy raffle tickets with points to win prizes or cash. In the end, I just preferred the sure thing rather than gambling with my points though your mileage may vary.
Anyway, I hope you join if you find the idea interesting and want to earn some prizes with minimal effort. If you need help or want more info, just drop me a line. After all, if you do sign up it'd be in my best interest to see you continue with the site.