The 60 GB PS3 (€600) plays PS2 games, the 40 GB PS3 (€399) does not unfortunately. It also seems like the 40GB will be the only one available from now on. Accessories could include extra controller - €50, stand €?, HD cable for tv's with HD, other than that the most important thing is get the right games. Have you bought PS3 yet?
The PS3 can create a virtual memory card on the hard disk so you shouldn't need one.Got the 60GB model in Argos. Heard that there is a memory card adapter you can buy and wondered if this is required to run PS2 games on the PS3?