Guys...
It has been 1 week since I flash my SGS to Darky's v8.0 Gingerbread Edition Wipe using Odin3 v1.3 and 512.pit. My SGS show:
Firmware version: 2.3.1
Baseband version: I9000XXJPY
Kernel version: 2.6.32.9 wasted@box #8
Its damn fast and Im really happy compare to the stock firmware.
But Ive two issue:
1. Battery drain fast: Its been a week now. The longest time it can last is 17 hours.
I use my SGS mostly for scrolling like nobody business, play angry birds, browse internet, sms or chat and that's about it. I seldom download app as my app now are more than enuff (for the time being, hehe).
Ive try a lot of way (including the FAQs way) to calibrate the battery but so far.... no improvement.
2. GPS useless.
I have tried the FAQs as well....but still cannot use. I can only use the google maps only which just like what i've used on my Nokia E66.
Hope the sifus can help me here.
Cheers!

Flash to speedmod kernel, enable ext4 all and all tweaks. It should helps..