Anywho, getting on with what I found. First off, I confirmed that Janyse Jaud is indeed the voice of Orange Blossom, and Strawberry herself is played by Anna Cummer (who, tangentially, is also the lead in Barbie's Thumbelina). Unfortunately, this is all that I was able to find out at the present. Although I did find a trailer for the Sky's the Limit! movie coming out this fall. All the footage used is from the pilot episode, though, but it shows the cover art at the end at least. I can't link to it directly, but if you go to this website and click on "Featured," you'll see an image of Strawberry that you can click on to bring up the trailer.
Edit: After finding out the voices of the new Core 7 My Little Pony animations, I'm 97% sure that Britt McKillip is the voice of Lemon Meringue. Also, you can now find the trailer for the movie on Youtube.