> Just curious: do debs have real multi arch support yet?
As far as I know, they don't.
There was some interest in adding that in the early AMD64 days, but as it turned out that it is quite possible to have a pure 64-bit userspace, interest slowly faded.
Right now, 64-bit Debian distributions are mostly purely 64-bit, with the few 32-bit packages present encoding their 32-bitness into their name (e.g. libc6-i386). It's not pretty, but it works fine in practice.