According to the Nikkei, (Japanese, login required; English; login not required but the article is different), AU is lifting the ban and will allow skype over 3G with the release of the IS03 Android phone from Sharp. (More on the IS03 in English here and here.) Docomo is expected to follow suite. Both the IS03 and Skype with AU should be available from November.
ＫＤＤＩ（ａｕ）はインターネット電話ソフト大手のスカイプ・テクノロジーズ（ルクセンブルク）と提携する。11月からスマートフォン（高機能携帯電話）で、通話料が基本的に無料のソフト「スカイプ」を利用できるようにする。米アップル製「ｉＰｈｏｎｅ（アイフォーン）」など国内外のスマートフォンと無料か割安な料金で通話ができる。ＮＴＴドコモもスカイプを解禁する方針で。。。But there is bad and ugly along with the good it seems. Au and Skype are partnering to route calls through AU's network, which is what Skype and Verizon did in the US, resulting in good quality, but the freaking app only worked on 3G - no wifi. Now in the US, there is the official app, which only works on wifi. In the beginning, the only Skype app for Android used voice minutes for calls. What a mess. AU is still considering whether to charge voice minutes for Skype calls on their network on the one hand, but saying they don't expect to take a revenue hit if calls were free on the other.
Because calls between Skype users are free, mobile-phone companies have feared their revenue would decline should they make the service available. For that reason, the Skype app was viewed as verboten until now, according to KDDI Senior Vice President Takashi Tanaka.
The firm will allow Skype calls between au subscribers to go through its network rather than the Internet, which will put the quality of those calls on par with regular telephone conversations. It is still exploring whether to charge cellular fees on those calls.
And even if the calls are free, KDDI expects a muted impact on revenue because it anticipates growth from smartphone data transmission fees.