BKK2 on 07 September 2008
Additionally, another free online service will be launched this fall which enables users to play PSP software titles featuring ad-hoc mode over the internet through PS3 with other online players. PSP software titles such as “MONSTER HUNTER PORTABLE 2nd G” from CAPCOM Co., Ltd. will be compatible with this new online service.*2
http://www.scei.co.jp/corporate/release/pdf/080902be.pdf
That should require a PS3 system update, so expect one by November at the latest.
