Speaking in an Online Language Class

I have been spending more time than I hoped, designing one of my courses for a particular school I teach with. I changed textbooks for this school from last semester to this one. I didn't realize that, by doing that, I was also taking away a speaking component that was already built in with the previous text. I want to create voiceboards where, just like a written discussion board, students verbally respond to an oral post, and then comment on the posts of their classmates. Vista Higher Learning's Adelante Supersite provides an actual voiceboard powerd by Wimba. But I've changed to the "En Linea" program for other reasons. But the voiceboards are not present in En Linea. It is nice that there are several assignments in En Linea which have them recording their voices (ideally, they are supposed to find an epartner, but logistically that will be a nightmare so I won't require it.) But I want more authentic communication, hence, a voiceboard. I have recently been alerted to a nice looking program called voicethread.com. It's not exactly what I am envisioning needing for my class, but it provides some of its own really great qualities. I have an idea, which will either be a masterpiece or a disaster. Or I guess it could also fall somewhere in between. I have been using vocaroo.com for awhile now with students who submit their voice recordings to me in an email. My idea is to have them record their voice there, then paste it into the discussion board. Then can then listen and verbally post to each other right there in the discussion board of D2L, hence, my voiceboard. My fear is that the process will be choppy, going back and forth between D2L and Vocaroo. It shouldn't be too bad if students just open up a second browser and go back and forth between the two. So we will see how it goes. But until the course starts on August 30, I will continue to scour the internet for other possible tools to fit my goal!