I just don't know enough about how u-boot and C work to get u-boot 1.3.x working on my s3c2410 board. I managed to get 1.2.0 going with the nand commands added (not mtdpart though) which should be enough to get linux booted (though I'm not entirely sure the nand commands are actually working - experimenting with jffs2 now).
If anyone is working on s3c stuff and wants me to try running their versions I'd be happy to help.
Machine config is:
AM29LV800 (1mb) K9F1208 (64mb total) 64MB ram SD Card Ethernet (cs8900) USB 800x480 LCD (driven by s3c2410) touchscreen (driven by s3c2410)
I have no way to switch between NOR and NAND boot though so u-boot has to start in NOR unfortunately (might be why I can't get 1.3.x to work?).
I have a wiggler clone but I'm still trying to figure out how use openocd to debug with.