This is pretty old news.
This is from ANN:
Negima to not be censored (2004-02-27 15:07:22)
Dallas Middaugh, Director of Manga at Del Rey, has announced the following: "NEGIMA, Volume 1: Magister Negi, by Ken Akamatsu, will be published by Del Rey on April 27th as scheduled without any alterations to the author's original artwork and text. At the suggestion of one of our leading national book retailers, copies of NEGIMA will be shrinkwrapped with a label that states: "Contains Explicit Content, Ages 16+" on the front of the book."
The discussion is on this link.
http://www.animenewsnetwork.com/bbs/...pic.php?t=5954