Hi GreenGeek,
Yes, all the pages provide a popup player. You can kick off a popup player in the GetAlbum, GetArtist and PlaylistPlay pages. In the latter 2 pages there is a link right below the player that says 'Popup Player' and in the GetAlbum page there is an icon that you click just below the player to launch the popup player.
You can see a screenshot of the popup player running (from v1.2)
HERE.I have removed the demo from the site because there was just no way to host a demo for version 2.0 since everything occurs dynamically. In the older revisions, the scanner actually created the XSPF playlists at the time of the scan so I was able to host the demo without actually posting any actual mp3 files on the site. The new revisions generate the playlists on the fly and do validation during the request so its impossible to host the demo (unless I found a host that was affordable and allowed me to host mp3 files.... but then that opens a can of worms because the minute you make your collection available over the internet you are subject to Radio Royalties to the RIAA).
Personally, I feel the screenshots are enough to demonstrate the application.
As for 64-bit OSs, I can't really say much about that since I have never used one before but one of our members was able to get the CMS running on 64-bit by getting the 64-bit SQLite libs and overwriting the 32-bit ones that ship with the cms.
Hope this helps,
--T3