Back in the day I thought Amazon’s Wish List feature was a killer app, but I reconsidered after trying to get relatives to find my list and return to it months later when my birthday came around. I didn't like having my list tucked away in some corner of the Web. Why not scatter my reading, viewing and listening habits to the four corners of the Web? (No one bought gifts from my list anyway.)
And We'll Have RSS Wherever We Go
RSS Readers are great for getting content updates, but the real value of RSS comes in displaying your own content on other pages like your blog or a personal portal page like PageFlakes, NetVibes or iGoogle:
I'm waiting for my library to pull their lists into their Web page with an RSS-to-HTML converter. If you see anyone doing that, please leave a comment or trackback if you blog it.