I see many questions here that I would like to know the answer too - Is it possible to watch a question so you are notified when other users answer it.
click on star button which resides next to any question, Later you can find those question in your favourite section. If you are eager enough to know answer you will keep checking from your favourites.
It's like keeping a memory address reference.
You can subscribe to the RSS feed of a question as described here: Subscribe to others' questions
So the feed for this question would be