Hmm, I'll give this a try I hope there are some good performance increases. I guess the WIFI addition is because they are releasing their EXT-USB and USB WIFI sticks soon. Maybe the SD input/output adjustment means we can stop transferring files at <1 mbps.
Benchmarks to come:
1.2.1
SNES Emulator - Compatible: (Loaded from state save, left running for 30 seconds to stablize)
Yoshi's Island - 48 FPS
SNES Emulator - Fast: (Loaded from state save, left running for 30 seconds to stablize)
Seiken Densetsu 3 - 38 FPS
PCSX4Wiz - Wiz clock: 800Mhz, RAM Tweaks on, Frameskip 1(Video), Interlacer OFF, Sound ON (XA+CD Audio), CPU Clock 100%, CPU Bias 7, HLE Secure, NTSC
Legend of Dragoon (Menu Screen) - 20/30 FPS
Copying 1, 350 MB file from computer to Wiz (SD card) over USB - 1.02 Mb/s
1.2.6
SNES Emulator - Compatible: (Loaded from state save, left running for 30 seconds to stablize)
Yoshi's Island - 49 FPS
SNES Emulator - Fast: (Loaded from state save, left running for 30 seconds to stablize)
Seiken Densetsu 3 - 45 FPS
PCSX4Wiz - Wiz clock: 800Mhz, RAM Tweaks on, Frameskip 1(Video), Interlacer OFF, Sound ON (XA+CD Audio), CPU Clock 100%, CPU Bias 7, HLE Secure, NTSC
Legend of Dragoon (Menu Screen) - 21/30 FPS
Copying 1, 350 MB file from computer to Wiz (SD card) over USB - 1.06 Mb/s
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No problems with SD access, Auto Scan in Win2X seems to take a little bit longer but other then that no problems. No change with screen tearing.
I see no real change for Yoshi's Island or Legend of Dragon, looks like a 7 fps gain in Seiken Densetsu 3 on the SNES emulator though. There were no problems so far so I can confidently say go ahead and upgrade.
Edit: OMG, Touch screen tracks all the way around the screen now, no dead spot on the left and right side anymore!!! I also seems to be much more accurate!
Edit2: More info seems to be shown by TOP now in Termula2X
Edit3: Not that you would want to use a swap file on flash storage but swapon works now.