You can easily buy batteries for £30-£35 on ebay (thats where i'll get mine) and i'm sure 3rd party batteries will become available.
And i agree, that price for the DS console and 4 games is great value, but i can't stand Nintendo anymore...the games just annoy me. (although, like you, i did LOVE goldeneye and Perfect Dark, I must have spent half the year playing multiplayer on those two games plus Turok and Beetle Adventure Racing. :S
Yeh, i'll post some photos and stuff when i get my PSP (hopefully by friday) :(