I've been a bit busy there myself lately.  I've revived a very old (and seldom practiced by me over the last few years) habit of writing reviews for stuff, including some of the movies I've stuck up reviews of over here and at another site I frequent.

I've definitely enjoyed shopping there, and have done a bit of selling too (to help feed the shopping habit, I sell stuff I don't want, get Amazon.com gift certificate credits for it, and then spend the $$ right back in the same place...)   I've grown to prefer Amazon over eBay by leaps and bounds.  More safety for sellers, and less hassles for buyers though I'm careful about what I buy used as there are some small print notes and restrictions on the guarantees for purchases from third parties.

It's funny though, as back in the early 2000's there were serious doubts about whether Amazon was really ever going to be viable.  Look at them now and you'd never know it.