In the SDA topic, FierceLinkMaster had a post that links to divx movie files that show a trick to avoid having to use a bombchu on the beamos in Spirit Temple, and one that shows Link running through the desert really quickly (using action replay or something like that to boost up the speed). The running is really unoptimized, since I'm pretty sure he was doing that in real time, but it does give a general, though vague, idea of where to go. But as for the perfect path, well, that'll take a ton of testing.
Haunted Wasteland:
http://paperpengo.com/Zelda/Haunted%20Wasteland%20Dash.divx
Beamos Skip:
http://paperpengo.com/Zelda/Beamos%20Super%20Jump.divx
Just in case you haven't seen it. And the ground jump stuff that's been talked about recently is pretty interesting too. Maybe if getting the bombbag upgrade as a child that lets you have bombs as an adult doesn't take too much time, it could be useful for the Forest Temple. And bombs might be useful in other places as well. But I'm not really sure if it can be used to save time.