There have been a few examples of this feature request floating around the forum under the API & Customizations category, but I encourage anyone who wants to implement this themselves to take a look at this post by Nic: Update multiple records with a checkbox. It employs and expands upon one of the custom code examples we have in our dev docs (Add checkboxes to a table).
This request is still on our radar as a potential built in feature, but we hope that gives you an avenue to implement this yourselves in the meantime. Thanks!