Running P8 in Ubuntu 9.10. (64-bit) here too in a quad-core machine with 6 Gb of ram (and earlier in 9.04). Apart from the need to run the library palette within a separate browser window, P8 works very nicely, is fast and responsive and installing was a breeze too. Depending on one's graphics card, Wine settings may need some tweaking (like, for example I don't like running P8 in a mode that gives Gnome full control of the window behaviour and decorations).

 Personally I don't see any performance hit like TwoDigital has - in fact Wine gives all resources exposed to it straight to whatever program it runs (like I can use my Wacom tablet to control Poser out-of-the-box if I so wish). The Daz installers are a PITA, though. I've a barebones WinXP installation within a VirtualBox so Daz installers that won't work in Wine, I can run in WinXP. If Daz resources are to be installed, one should take the Daz installer issue into consideration.