Sounds like a workaround for a feature Doxygen is lacking. Maybe we can hack Doxygen to supports this?
The doxygen command is "@todo". We have been using FIXME (and I've seen XXX in for example StatusNet). I left FIXME in, because I though (actually *hoped*), that devs would occasionally look at it. Otherwise it might be a good idea to just also create bugzilla: enties for the todos/fixmes in core.
XXX in Morse is - . . - - . . - - . . - , which is a signal for emergency :-)
FIXME and TODO in comments are recognized by the Eclipse IDE which show them as a list of tasks and are highlighted by vim syntax coloring.
I do agree with opening bug issues for each @todo, will have to make sure to update the code with the bug reference number. It is a long task though.
I am almost sure I will keep using // FIXME stuff , because I will just forgot about the @todo. Or I can just use the @todo :-) Marking ok nonetheless.