I have two versions of Weiss Kreuz...one is from Animefiends and one is a .asf format. Of course Animefiend's is the better version. You should go to #animefiend channel on IRC Efnet. Then you can ask one of the ppl there to setup an FTP server for you to download from. I have slow connections and it took only 3 days to finish all of the episodes.
You might want to read: http://animefiends.org/help/leech.html

As for Gluhen, I also have it and I downloaded it all from Kazaa.
I would like to seed Weiss Kreuz & Gluhen but I am now seeding 8 anime titles and planning on 7 more titles. So I am not sure when I can seed Weiss...maybe next month or September, as per request from other anime forum.