and if we're lucky, and the R-pi supports 64 bit extension, it might even be able to run N64,PS2, and perhaps PSP emulators.
XBox, Wii, and PS3 are out of the question.
To be honest, PS2 and PSP are currently pretty much out of the question on machines running the next processor generation up from the Raspberry Pi (such as the Pandora and the Nokia N900, for example, which both use the Cortex-A8 based OMAP3530 SoC). I'd imagine that the RPi would have no chance with these.
My question will be, if there will be any support for these emulators, or at least a way to port some of them (from Debian/Redhat compilations) to this operating system?
At least some of them exist in the ARM repositories for both Fedora and Debian (I'm afraid I don't have the links to hand for their search facilities at this time – sorry about that!). However, there may be merit in drawing from the source code of the versions already ported to ARM handhelds, such as the GP2X, Wiz, Caanoo, and the Pandora, and possibly the MIPS-based Dingoo A320 (which has had stuff brought across to the previously-listed four), as they're more likely to be optimised for low-power architectures than straight recompiles of stuff aimed at beefy x86 machines.
Worthy of note is that you would have to do this for Snes9x, anyway, as the current versions of that don't work properly on ARM CPUs – my understanding is that you get a blank display. In that case, I'd recommend recompiling Snes9x4D or Snes9x4P, which are Dingoo A320 and Pandora ports of it, respectively, which work beautifully, though they do run Star Fox at twice the speed that it should run at.