Ah, that's what you meant by tags. Yes, that would be nice. On the other hand, I rather doubt that tags would instantly create massive demand for PB's services - other places like Intrade have well-categorized predictions/bets, and none of them have seen traffic explode the moment they implemented that feature.
If you really found tags all that valuable, you could start doing them inside comments. Go over the 969 upcoming predictions and add comments like 'tags: personal, exercise' or 'tags: America, politics'. Later, it'd be even easier to turn them into some real software-supported tags/categories, and in the meantime, you can query using Google. This wouldn't even take very long - at 30 predictions a day, which ought to take 10 minutes max, you'd be done in a month.
(I doubt you will adopt my suggestion and tag even 500 predictions (10%). This seems to be common to suggestions for PB: 'I'd use and really find PB useful if only it were executed better in this way', which of course never happens. It's starting to remind me of cryonics.)
If you really found tags all that valuable, you could start doing them inside comments.
Preliminary report: this isn't going to work, not without drastic contortions in the choice of tags (which IMO kills the effectiveness of the tactic). For instance, from my first set of 30 I tagged a number with the tag "personal", predictions which only concern one user (or two acquainted with each other) and that I don't want to see because I can't effectively assess them. The Google query including "personal" returns close to 30 spurious results...
A tournament is currently being initiated by the Intelligence Advanced Research Project Activity (IARPA) with the goal of improving forecasting methods for global events of national (US) interest. One of the teams (The Good Judgement Team) is recruiting volunteers to have their forecasts tracked. Volunteers will receive an annual honorarium ($150), and it appears there will be ongoing training to improve one's forecast accuracy (not sure exactly what form this will take).
I'm registered, and wondering if any other LessWrongers are participating/considering it. It could be interesting to compare methods and results.
Extensive quotes and links below the fold.
A general description of the expected benefits for volunteers:
Could that be any more LessWrong-esque?
More info: http://goodjudgmentproject.blogspot.com/
Pre-Register: http://surveys.crowdcast.com/s3/ACERegistration