WHAT? THERE'S A V4.3 NOW?! CRAP!
I highly doubt that you'll be able to install Homebrew as of now, since v4.3 deletes and prevents all current Homebrew/installation methods. However, every system menu update so far has been cracked in a month or two with a new Homebrew installation method, like the Bannerbomb v2 upgrade to conquer the SD card menu. So I wouldn't call it unlikely that a new version of Bannerbomb, or a better installation method entirely pops up soon.
Oh, and whatever you do, don't downgrade your Wii. As I said, it's only a short matter of time before you can install Homebrew without a SEVERELY high risk of bricking your Wii. I was in the same position back when 3.4 or so was released; I just discovered how easy and cheap installing Homebrew was a day after it was released, and I was pissed it was rendered useless. =/ But luck have it, only a few weeks later Bannerbomb came out (as well as the next version of the Twilight Hack, but who cares ). Be patient, and you'll be rewarded; and for once that's true, lol.