This is definitely the one.
Took me a long time to get it. Download Link
Excellent. Mine flashed fine. Little bummed to not see the applications menu with game capability. That would enable launching the Ebook reader from within the firmware and not a separate boot so I could upgrade to 2.74 instead of 2.63 that I have to boot into.. First thing I noticed is the video out now has pal and NTSC settings! woo! Definite video playing improvement. One of the movies that was choppy now plays smooth. Audio settings has the 3D mode which has quite a few options for configuring things (3D on/off, speaker type, bass settings, etc) and an EQ section that has about 7-8 presets. I did not see much else, ebook and photo sections look the same with no new options. Would be nice to have a slideshow in the photos. PICSHOW app does it but without the apps menu you can't launch it from the firmware. So hopefully now we'll get some DIY firmwares that include that feature. Nice we have a better firmware now!