Install Cloud Save, and you'll add the ability to right-click files on Web pages you visit and zap (or sideload) them to various online services like Google Docs, Dropbox, Picasa, Flickr, Posterous, CloudApp, and Box.Net. The extension appears to be based on drag2up, another handy little Chrome extension, as you'll see some of the auth dialogs refer to it instead of Cloud Save.
By default, Cloud Save shows you desktop notifications when a transfer completes -- though you can shut them off if you like. It's a handy extension for zapping found files to your cloud storage without having to download them to your desktop first.
Hey, do you remember Google Bookmarks? I didn't either, until I heard the news that Google Bookmarks now has the ability to create and share lists of links. After a moment of confusion, I realized that Google Bookmarks wasn't a new product, and I started playing with lists.
They're actually quite useful! On top of creating and sharing, you can import all of the bookmarks from a friend's list (or a public list) into your own Google Bookmarks account. You can also open up lists to let your friends, or the public, add new links to them. Since this is a Google product, I don't think you'll be surprised to hear that it also suggests links that might fit into a list you're making.
Bookmarks are in a weird place right now. Sites like Delicious, which looked like the future of bookmarking a few years ago, have become less relevant. Many people are storing their bookmarks locally, and syncing them across machines with plugins like Xmarks or features like Chrome's bookmark sync. If anyone can bring users back to web-based bookmarking, though, it's Google, and a lists feature is an important start.