This is something I've been working on over the last few weekends, and I feel it's finally ready to show you 
deps.rs parses Cargo.toml files in GitHub repositories, analyzes the specified dependencies based on information from the Crates index, and then provides dependency status reports.
There are also svg badges that you can embed into your readme to keep an eye on your dependencies!
You can see an example for hyper here: hyperium / hyper - Deps.rs
Let me know what you think!