I usually use www.winkflash.com... most of the year they have a flat-rate photo book promotion where you can create a 100-pages book for $19.99... right now they don't have this promo (they only have 50% off which is already good) but if you wait a little while (3-4 weeks) you should see it coming out. sign up for their newsletter and they'll let u know as soon as they have it.
How's the quality compared to Shutterfly?Ease of use?