Subscribe to the BlogWow, that's a lot of questions.
Spec is really up to you and what you enjoy more. I found feral to be very efficient and great for leveling. Not much downtime required between fights. But, I planned all along on being feral at 70, so I never went any other route. I can't compare it to Boomkin.
Travel form is one speed (40) and it doesn't get upgraded. Land mounts are always faster. Regular mount is 60, epic mount is 100.
As for what to do at 70, it's really up to you. Tanks and healers are always in demand. Boomkins are somewhat maligned, but a lot depends on gear and the player. Don't plan on cake and oreos. No class/spec really gets both...there's always trade-offs. Pick a role that you think you'll enjoy and try it out.
What is best to level beyond 40? Stay feral, or switch to moonkin? I hear quite a few back and forth discussions on this and the only thing i get is "depends on your style". My style is for which ever one kills fastest with minimal downtime.
Also as druids does our travel form have the same speed as commensurate mounts? It seems my current travel form is as fast or faster then my mount? Will this apply to level 60 when its time to get the epic? Do i get a faster/improved travel form? I am currently 34 and feral spec'd.
Lastly, @ 70 which of the 3 talent trees will get me into more while somewhat preserving my digity with decent DPS? Now if i have to forego my DPS to get into a group so be it, but if i can have some cake with oreos instead of just cake then ..sweet.
I hear alot of back and forth about gear @ 70 and PvP, what gives?
By the way ...droods are definately a kick ass class, just in case some had a doubt. This will probably become my main toon as it is limitless.