At last, I got a (borrowed) Wii to test if Bricks-OS works. A binary that I know worked before (see screenshot in screenshots page) now doesn't, HBC reports it to be an invalid binary. The v0.0.3 demo DOES load, but gives a black screen like you said. So I removed the binary from the download page.
Previously I used a simple TCP/IP loader (don't remember the exact name) to run homebrew on the Wii, now I'm using the HBC. I think the HBC has more/other restrictions when loading .dol/.elf files, compared to the loader I used before. And perhaps a different initialization sequence could be cousing the black screen.
Anyway, it can't be difficult to get Bricks-OS compatible with the HBC.
I'll keep you updated.
EDIT: @drkmagus what loader did you use to run Bricks-OS?
