Dunno if anybody spotted this, some guy is selling the software for DayDream rom boxes, he also reckons that with his other NeXT gear he has 5 of the rom box dongles, but he ain't found them yet.
http://cgi.ebay.com/DayDream-Softwares-NeXT_W0QQitemZ260039648574QQihZ016QQcategoryZ51046QQssPageNameZWDVWQQrdZ1QQcmdZViewItemGet 'em while you can as they are very cool/weird.