Inline code comments like:
"//TODO: change the behavior to fit to the RFC"
are very good to make quick notes while implementing things.
To have them in the tasklist (as netbeans does it already) is a very convenient workflow to keep the tasks "in mind". 

On large project it is a good thing to have each "TODO" assigned to a team member or just to have the "TODO" prioritized and/or "milestoned". This is where a "TODO" become a "Issue".

It would be beautiful if you can add a "convert TODO to issue" as a hint / as a tooltip to the code line, where the "//TODO" is entered. The hint should be clickable and show the "new issue dialog".

In the tasklist a TODO entry should have a context menu showing "convert TODO to issue" which should open the "new issue dialog", too.

There should be a option in that dialog to configure if a normal "//TODO" should stay in the code file after finish the "convert" command and if yes additional comment lines should be introduced, if the user likes this. E.g.:
//TODO: change the behavior to fit to the RFC
/* This TODO is now available in issue tracker
 * @issue_tracker: $trackername
 * @issue_id: $issueId
 * @issue_author: $author
 * Details on and the current status of this issue can be found here:
 * $issueUrl
 */ 

This behavior ensures that "old-style IDE" can work with the "TODO" as normal, while developers that uses a "old-style IDE" will get advanced information on this TODO.

I hope to see this soon in a upcomming release.