This is cool...an onion skin preview! See a screenshot at the link:

http://www.fragmosoft.com/forum/viewtopic.php?t=34

Also, a tutorial has been posted. I haven't had a chance to check it out, but here it is: http://binarypictureshow.com/site/staticpages/index.php?page=20050215083136858

Both 3DS and MD3(Quake 3) support is on the todo list, and there's an X dll update available(see progress log section).

Also, the vertex animation support for our MDL7 is export only, so you're not going to be able to import your preexisting animations...at least not yet. Fragmo did mention that he'd implement that if there was a call for it. It's not that big of a deal, though.