After working in the help threads f'er a lil' while, I 'ave been thinking how useful a tagging tool would be. F'er example, if I was helping a floof with commuter problems and they mention in a later reply that they are using a Mac, 'twould be most helpful to be able to tag a member who is great with Mac situations. 'Twould grab this said user's attention and they may be able to help out.
On another note, being able to tag y'er friends in comments and/or threads that they may be interested in would also be handy. Now, I'm not even sure if this be possible, being an old site n'all. But 'tis just a thought.