DVD2One is getting a lot of forum time at
www.vcdhelp.com.
However, not quite like DVDxCopy because:
1. you need to rip the DVD with separate prog (to avoid DCESS problems for author)
2. you need to burn with your own program (I think)
3. does not copy menus but does keep chapters
4. can fit DVD-9 onto one disk
So I guess it's not really that similar after all