If you try to install The Homebrew Channel beta8 with version 3.3 of the system menu, you’ll get a message that looks like this:
The Homebrew Channel has only been tested with
Wii System Menu version 290 (v18) and below.
Press ACCEPT to continue at your own risk or CANCEL to abort.
As we have tested The Homebrew Channel with this new system menu, continuing installation at this point is safe. Please make sure you check with the usual sites to make sure any future updates are still compatible with The Homebrew Channel. This only applies to the System Menu 3.3, shown in the message as v22 <region>.