Divineo.Net the worldwide store for consoles, modchips, flash carts and more have let me know they have the following new accessories coming very soon, here goes:

Datel PSP Products

4GB SOLUS PACK
MAX MEDIA DOCK - Connect compact flash cards or 4Gb + Max Media Manager
GO MAX (RE-USEABLE BATTERY PACK - USES 3 x AAA BATTERIES)
ESSENTIAL DUO DOUBLE PACK - 2 Replacement INT BATTERY 3.6V (1800MaH)