Hello leet. You've made some good programs for psp, if I'm not mistaken. Cool to see you coming to the wii side of things.
First of all;
The wii doesn't use imposter as a term (commonly), so id explain that further in your thread
Second- the wii doesn't use MIPS, like the psp does, it uses PPC, so just a word of caution before you release it. It will be more confusing then helpful, with all the jr ras, etc. In comparison to the stws, lw, and addis commonly found on the wii.
And now onto my suggestiongs:
A codetype helper. This, in my opinion, is more important then the asm instruction explainer. Seems like most people don't use complicated instructions.
Perhaps a faq section for the wii.
As for the psp, id try and explain codetypes... it seems I can only find something on decompressing 0x40, subs, and constant writes. Id like a 0x20 explanation in there. Perhaps a html document, kind of like the wii cheat type document for wii, but to explain sub-routines, and have common tutorials in it, such as how to joker and such, with giving credit to the original maker, of course.
I don't think I can think of any more, but if you want help or more ideas, ill find something that confuses me or has given past issues, and let you know if you'd like.