@gordon In my opinion the 32/64bit distro problem is a longer-term matter. With the first release I'd wholly expect to have to compile it from source on whatever flavour of Linux and then have the the nicer packaging will follow on shortly...
For STLWRT to stand a real chance of gaining traction across the Linux world it ultimately needs to be easily installable by regular end users on all the major distros - at the very least we're going to need to aim for DEB and RPM packages, but I'd imagine that you also need to consider Arch and Gentoo plus others (Despite the fact I've never run Arch Linux, I think it's got some of the best documentation out there which I frequently refer to for other distros - having Arch embrace STLWRT could be quite valuable). I would presume that there's a path available for Ubuntu where you actually get STLWRT included in repos for core 32/64-bit Debian releases, which then cascade to Ubuntu/Mint etc?
And again, just my opinion, but I think it needs to start life as a drop-in alternative to GTK3 which co-exists and has a simple configuration file or tool for users to switch between STLWRT and native GTK3 globally, with some kind of override/exception list to bind specific applications where necessary.
Sure, a Live CD would be cool for demonstrating it but I think the real magic is going to be when you provide an instant fix for users like me who've just upgraded and discovered the true horror of GTK3 for the fist time - here's my take on how it might play out:
Step 1) User upgrades to newest LTS version of favourite distro
Step 2) "OMG! This is horrible! What have they done to the UI? Where's the frakking menu gone? Where's my title bar?"
Step 3) Google
Step 4) "Ok, so there's this thing called 'STLWRT' that claims to fix this...": <package_manager> install stlwrt
Step 5) "Holy mother of Jehoshaphat! This thing actually works!"
Step 6) Normality is restored! All is right with the world and we can continue to love our hamburger-free, organic menu bars for eternity
P.S. I have high hopes for STLWRT