Hmm, it should say the ver around your channels or settings. I can get into options and stuff fine, but I don't see any slot illumiation option. It says my ver is 2.0 That may mean I only updated it once, not sure.
I think if you set the slot illumation on its highest setting, it will stay lit. Downside is that I think it will stay lit even when the console's off. Then again, its only what Im hearing from other people. I don't have wireless, so can't connect my Wii online and update it atm.