I am working on a paper on a PS2 game, Project Zero (Tecmo, 2002). The game allows only three game saves to a memory card. As I want to go back to specific sections of the game later on, the limitation is awkward. Fortunately, the game runs on my PS3.
60G PS3 has a feature that it can used to play many PS2 games. What is really useful for a game researcher is that one can create memory cards to the disk of PS3 and use then instead of buying physical cards for 15–20€. This ability to save to hard disk comes handy when a game allows eight or three saves from a game to a card, and obviously saves money.
Currently, I have five memory cards set up in PS3 hard disk for the Project Zero saves, and more will be coming as those cover only the first night (there are four nights, I remember correctly). Still the saving process could be easier, but beats using PS2 for this.