Regarding XNA, I don't do that. Don't really have the time to either. If you know someone that does feel free to invite them to convert any of these. I know boned and weighted is the preference there but most of these didn't come out that way. I can obtain that and the animations from the Smash-Up ones but will only do it if someone has a request they are going to follow through on as it takes up a lot of server space to host them.
Else a reminder on requests that these are extracted with whatever knowhow and tools I have at a given time which was passed down to me by the greats at the great forums. So characters will be missing and probably ones you really want. Notta I can do about it sorry. Know that myself and the aforementioned greats are still working on all that but it'll take the time it does. Else be patient and hope your getting some sort of fun out of these.