Today we’re thrilled to be able to announce a big new addition to Basecamp: You can now attach files and post comments on to-dos and milestones. Previously this functionality was only available on messages.

Watch a bigger version of this video on the 37signals Product Blog.

A quick look at how it works

A green comment icon after a to-do or milestone means there are new comments on that item. A dark grey comment icon means there are comments on that item, but you’ve already read them. And if an item doesn’t have any comments, you’ll see an empty comment icon when you hover over that item. Clicking the comment icon will take you to the comments view for that to-do or milestone.

Deeplinking: A happy side effect

This new feature comes with a great side effect: You can now deep link to individual to-do items or milestones. Previously you could only link to a to-do list or the milestones section, but now you can link directly to individual to-dos or specific milestones.

Project management is communication

This new feature is directly in-line with Basecamp’s core premise: Project management is communication. Before you had to keep all your discussions in the messages section. That worked, but it required you to discuss one part of your project in another part of your project. Now you can have discussions about to-dos and milestones right on top of those to-dos and milestones.

We hope you love it

We’re really excited about this new feature. We think it’s going to help you get a lot more more out of Basecamp. Thanks again for your continued support!