If you are a hardcore gamer, then you may already know by now that Nintendo has released its next generation handheld gaming console - Nintendo DSi
This one looks just the DS physically, but with dual cameras. Engadget claims that it is much slimmer than the previous one.
You may find the review of DSi in the below links interesting. Below that is a video of DSi featuring some capabilities of the kind of games that it was host and its touch screen functionality.
I also found this side-by-side comparison of PSP, DSi and iPhone hardware specs interesting.
PS: One a total unrelated and stupid note from me, I dont know why they add a post fix "i" when they add a camera to the existing model - DS => DSi. The same happened with Nokia E61i (which is same as Nokia E61, the one that I have currently, but with a added camera).