How can I get Quicksilver to open bookmarked URLs in Chrome?

There is now a Google Chrome plugin for Quicksilver (with documentation). Version 1.0 was released on April 27, 2012.

You can also do this with a custom trigger:

• Item: a bookmark from Safari or Firefox
• Action: Open URL With...
• Target: Chrome

Currently there is no Chrome plugin for Quicksilver, so you can't access your Chrome bookmarks directly. But you can sync your Chrome bookmarks with Safari, using something like xMarks.

Then, once you installed the Safari Module, you can access those bookmarks with Quicksilver.

And when you use the "Open URL" action on those bookmarks, they will open in your default browser, which is Chrome.

You could also drag the URLs from your browser (FF, Chrome, Safari all support this behavior, on 10.6.8 anyway) to create new .webloc files, add them to a specific folder named 'bookmarks' for example, then add that folder to Quicksilver's catalog from the 'File & Folder Scanner' and invoke opening them that way.