Ok I'm going to have to call bullshit on the memory upgrade. It requires a lot more than just installing the chip and re-flashing. I'll post a modding article on how to upgrade the memory soon.
The downside is that only a handfull of flash chips are supported by the allwinner NAND driver (by their manufacturer and device ID), and you can't extend existing storage - it can only show up as its own partition with its own mount point.
In any case I think it was silly that you posted that your flash upgrade worked.
You're right, it didn't end up working in the end. I didn't mean to mislead anyone. I had installed the chip and afterward was getting errors on every boot, so much so that it was painful to even boot into the OS and once there most everything would crash. I then reflashed the Yinlips stock rom and chose format everything. After that, the unit worked normally. Unfortunately I never bothered to check whether or not the new free space was actually available to me after the reflash and before I posted my mods here. As stated above, the Wii only comes with 512mb of flash installed anyway. I dunno how I got it in my head that the Wii came with 8gb. I then ordered a 32gb chip from digikey and actually ended up killing the motherboard in my unit pissing around trying to get things working. :/
I don't know how I missed your first post asking for a more in depth explanation. I was actually waiting until (if and when) I got things working 100% and was going to repost with my results then. I don't check these forums as often as I do some others. Again, sorry for my mistake. I've got a pretty decent rep on some other forums, and its not like me to ever purposely be misleading.