Here's a list of all the new features so far in v10. There's an additional 94 changes and 110 fixes made also but I'm not gonna post that.
--Yes, I'm that bored.
10.0.42 (1/21/04)
39. NEW: Smartlist searches are shown in a separate, full length search bar.
38. NEW: Print Wizard remembers printer and user settings between sessions.
37. NEW: MC shows a "Loading page..." message when loading a webpage view.
10.0.41 (1/20/04)
36. NEW: MC includes two new Hairstyle skins.
35. NEW: Action Windows blink for a while when started from outside the Action Window.
34. NEW: Retooled "Build Playlist" system in Action Window and unified all playlist creation through it.
10.0.38 (1/15/04)
33. NEW: Aquire images moved to Action Window.
10.0.34 (1/14/03)
32. NEW: Checkboxes for selecting tracks to rip.
31. NEW: Retooled Tag Info window functionality / look.
30. NEW: Added Access Control system -- replaces View and Playback filters. (still a work in progress)
10.0.32 (1/12/04)
29. NEW: Added "Ken Burn's Style" image slideshows. Press P while viewing images. (experimental -- may not remain)
10.0.31 (1/9/04)
28. NEW: CD ripping is done in the action window now. (still a work in progress)
27. NEW: Introduced super high quality image shrinking -- will make thumbnails and program art look better.
26. NEW: Several enhancements to the Photo Printing Wizard.
10.0.29 (1/7/03)
25. NEW: Added photo printing system. (File > Print Images...)
10.0.27 (12/31/03)
24. NEW: Introduced experimental database caching system -- helps performance in many scenarios.
10.0.26 (12/30/03)
23. NEW: MC fully supports reading / writing of Unicode (UTF-16) ID3v2 tags on MP3s.
22. NEW: Added new "Customize View..." dialog to List Style menu. (still a work in progress)
10.0.25 (12/29/03)
21. NEW: Added "no files -- double-click here to play all files" feature to Playing Now.
10.0.23 (12/22/03)
20. NEW: Ability to import AAC tag information into MC.
19. NEW: New Action Window based system for burning CDs. (still a work in progress)
10.0.21 (12/19/03)
18. NEW: Several enhancements to TV frequency overriding.
17. NEW: When creating a smartlist, you can select from a list of presets.
10.0.17 (12/16/03) - Pulled (MC\Data\Default Resources\FileAssocations.xml was corrupted)
16. NEW: Remade view scheme creation / editing system.
15. NEW: Added 'Camera' item to Action Window.
14. NEW: Action Window changes based on selected Media Mode.
10.0.16 (12/15/03)
13. NEW: Hairstyle configuration now allows unused root items to be hidden.
12. NEW: Hairstyle draws a play overlay on the currently playing track.
10.0.15 (12/12/03)
11. NEW: TV has functionality of frequency override.
10.0.14 (12/11/03)
10. NEW: Reworked Hairstyle navigation system -- requires less 'drilling down' in most cases.
10.0.13 (12/10/03)
9. NEW: Added Media Jukebox 8.0 to Media Center 10.0 upgrade path.
10.0.12 (12/09/03)
8. NEW: Added support for "DefaultButton" mega-skin item.
7. NEW: Added additional CD information to multimatch YADB dialog.
6. NEW: Updated registration code to work with the new purchase system.
10.0.11 (12/08/03)
10.0.9 (12/04/03)
5. NEW: Added "Media Mode" system.
10.0.8 (formerly 9.1.315) (12/03/03)
4. NEW: Redesigned Action Window system.
3. NEW: Redesigned Tagging Mode system.
2. NEW: "New Value" tagging mode item has auto-complete.
1. NEW: In-place editing has auto-complete. (both in file lists and panes)