Some really bad news...Ai Yazawa isn't well at all. ><
The August issue of Shueisha's Cookie magazine has announced on Friday that manga creator Ai Yazawa is putting her NANA series on hold due to a sudden illness. As a result, this issue did not run its scheduled installment of NANA. Since Yazawa will need several months of treatment and rest, NANA will also not appear in the September issue (which will ship on July 25) or later issues until further notice.
Cookie's editorial department offered its apologies to NANA's readers, and added that NANA's return has not been scheduled yet. Once the editors can confirm Yazawa's recovery, they will notify their readers of the manga's return through the magazine itself, the magazine's homepage, the official NANA website, and other means.
Viz Media will publish the 17th of NANA's 21 current volumes in North America next month, and it is also releasing both the television anime adaptation and the two live-action film adaptations. Yazawa was scheduled to appear at the Japan Expo convention in France next week, but Japan Expo announced on June 12 that she had to cancel due to health problems. NANA was on hiatus from June to November of 2007 while Yazawa recuperated from another illness and the resulting operation.
Source: Tomo Kimura (NANA's English translator) via MangaBlog
*offers a thousand paper cranes in the hope she gets better ASAP*