pandarens are teh shit! more than just a novelty if you ask me, but i think they would be better suited to the horde. Played the bonus orc campaign as a part of WC3 expansion? pandarens have a place in the game as much as a goblin if you ask me....dwarves have technical expertise too, but who supplies alcohol? that aside, the pandaren is an awesome hero.
i really, strongly disagree. there have been goblins in WC2 and 3. they were playable in 2, but i think they left the horde mostly in 3 and were just in those shops that you could find. if you want a Pandaren in the game someplace then great, put an NPC in someplace in Dustwallow Marsh selling alcohol or something. again, i don't think that one appearance in a tiny section of the add-on warrants an entire new race. i don't want to see player goblins either, by the way. they are a neutral race who only care about engineering and money.
as for the reptilian race, i have the same reservations with that as i would with a cat-person race that all the anime fanboys seem to ask for. both Everquest and the Elder Scrolls series have done both races first, as well as FFXI doing the cats, and you just know that people will draw similarities. perhaps if they did it really differently then people would not feel so cheated, but there is only so many ways you can do reptiles. ie: agile, higher ac due to scaly skin, perhaps a natural affinity with either arcane or bestial magics, depending on what type of reptilian race it is, ie: advanced intelligence or not.
the really neat thing about the Minotaur being a playable race is that i am not sure we've ever had one as a playable race in another game. i mean, they have always been around as bad guys, but to my knowledge never playable.
the Furbolgs might be a good idea, i dunno! apparently they were peaceful before the coming of the Burning Legion, so perhaps they could be implemented in such a way as AbsolootGeek suggests. one thing i see with that is that they would almost certainly have Shamen, and if Blizzard did that then they'd need to give Blood Elves paladins to even things up. some might see that as a good thing, ala balancing the two sides a bit more with shaman and paladins, but as Samari pointed out, others may see it as removing some of the uniqueness of choosing one side or the other.