Pending Changes Link is a Userscript which adds a link to Special:PendingChanges to the top toolbar. The source can be found here.
Installation edit
To install the script, simply copy the following into your common.js page.
importScript('User:Omni Flames/PendingChangesLink.js'); // Linkback: User:Omni Flames/PendingChangesLink.js
Note: You will need to manually bypass your cache after installation. Visit Wikipedia:Bypass your cache to see how to do this.
Usage edit
The script is primarily designed for use by Pending Changes Reviewers. Anyone can install, and use the script, however it's more useful if you have the Reviewer right (which you can request here).