It is true that you can resume being a werewolf after curing yourself of being a vampire lord, but I don't think it will be possible to become a werewolf again after curing yourself the vanilla way, however. Could be wrong, though, but it's just the feeling that I have. Hopefully they will allow you to become a werewolf again if you have cured yourself the current way.
Maybe they'll eventually add new ways of becoming a werewolf in future if Dawnguard doesn't do it since that is one of the big demands right now along with the ability to sneak as a werewolf, wild werewolves, and werebears. Lunar transformations are also requested by a lot of people as well, though I think that it should still be possible for more casual players to suppress the forced transformations if they are to be implemented, like limiting it to a certain form of the curse (non-Companions werewolves, for example) and having ways to prevent the lunar transformations such as the Ring of Hircine and/or a side quest to control the curse, etc.
Oh, yes, I almost forgot about first person perspective for werewolves as well in terms of hotly demanded features. And while this isn't necessarily a huge complaint by a lot of people, unique swimming animations for werewolves would be nice as well, since the current animation doesn't play so hot on them right now. Speaking of swimming animations, it would be nice if they fixed the backwards swimming animation for normal characters as well. This has been broken for me since 1.5!
