My experience: Wine-installed Windows-version of FireFox and Flash Player 10 launches and runs LSMGUI.swf when the LSMGUI.html file is clicked and P8 is running. In addition, within the browser I can add Runtimes and load items which end up in Poser 8 just fine. It's possible to use Poser like this, but a bit awkward of course.

Attached is a screen capture of a working setup. I resized Poser main, hid the library palette and and placed a resized FireFox  on the right hand side.

chardepot.pp.fi/Kuvakaappaus.png

Thanks BB for stepping in to shed some light. 

Also, the library issue  aside, P8 runs in Linux identical to Windows (I installed and run it with WinXP on VirtualBox virtual machine). Considering this is "out-of-the-box" behaviour without any tweaking and such, it's a nice thing.