Just verifying that yes, my builds (the previous 1.8.0 and the updated one) are 32/64 bit OSX intel - targeting OSX 10.5 (Leopard) and up.
Jerome's builds for 1.7.0 were named hatari_1.7.0_OSX_x86_ppc.zip and then there was an additional readme mentioning that they worked on PPC and 32/64 bit intel from 10.4 and up. I don't have an Xcode version that can build for PPC unfortunately :(
I don't think many users know or care whether they have a 32 bit or 64 bit kernel on their Mac and so hatari_1.8.0_osx_x86.zip (or rather hatari_1.8.0_2_osx_x86.zip or any other way of noting the new release) would suffice.
(And of course, if Jerome or anyone else wants to have a go at making a build of 1.8.0 for PPC/10.4 and up that would be even better :) I can post the updated linker-fixing version of my build steps)
/Troed