MAJOR UPDATE:
It seems as if Mahora Fansubs is continuing where they left off. They have already released Negima!? episode 21 and 22. You can download them using Veoh Client. There you can use the search with these terms: "negima ep".
Maybe I will upload them to megaupload later.
If you just can't wait, there should be torrents around. I will list some possible good hits.
Negima!? 21
Link1
Negima!? 22
Link1