What I'm most interested in about reforging is how it will effect drops. Because it seems to me that, if you can change Hit to Spirit on a piece of caster gear or vice versa on http://bit.ly/fmnhWBhealer gear, there won't be quite as much need to drop as much gear. http://bit.ly/fmnhWB

I'd change my spellpower tinker to haste in a heartbeat. Sure, I could just get a haste enchant, but then I lose my parachute. Likewise, with the removal of attack power, it'll behoove me to be able to change the +agi on the Adamantite Rifle to +str, or vice versa.

http://bit.ly/hNVhN4

They specifically said in the panel that Engineers would be able to Reforge trinkets. I expect they would be able to do ranged weapons as well.
http://bit.ly/gnYKjR