You can do this with the Blender particles as well, just click the Rot (not sure that`s the name of the button, I don’t have Blender here) green button next to Duplivert. You can then change the Tracking and Up axis the same way you do when using a tracking constraint.
Martin
PS: well, I could release the Dynamica code as is, but it would probably proove useless for pretty much everyone, so I’d rather do it on a personnal basis. If you want to try it, send me an e-mail and I’ll send you a link. It’s a bitch to instal sometimes, that’s why I don’t want to give the link to the public at once.