Linking from a Email Task BACK to the original email

[pereljon]

Its great to be able to create a task from an email. However, whats missing is the ability to link back from the task to the original email from which it was created from.
For example, if I create a task for myself from an email, and then I complete the task, I might want to reply back to the original email to let them know the task is complete.
There could be a "reply to original email" type button/link or a "go to original email" link.

Thoughts? Suggestions? Does this already exists?