A recent Chromium build added a feature that converts user scripts into extensions. Until now, Google's browser didn't provide an interface for adding and managing user scripts, so you had to manually copy the scripts to a folder.
Now you can visit userscripts.org and any other site that links to Greasemonkey scripts and other flavors of user scripts, click on the link to a *.user.js file and install it in one click.
Like any other extensions, user scripts can be disabled or uninstalled by visiting chrome://extensions/ or selecting "Extensions" from the Tools menu.
This week, Google released the first beta version of Chrome 4 for Windows, so the stable version should be available in the coming weeks. Chrome 4's major selling points should be the support for extensions and the long-awaited Mac & Linux ports.