Found this on the web...
http://www.pinstack.com/blackberryfa...179&artlang=en
or here is the list ...
BlackBerry OS v4.0 & v4.1 list of improvements (Download & Install)
Advantages of upgrading to RIM's Blackberry 4.1 OS
Here's the most complete list of improvements (4.0 to 4.1) available on the web.
Messaging
1. When composing a message, the 'auto find while typing' feature (commonly used in MS Outlook gmail, yahoo!, MS IE address bar etc) is used to help suggest the sender by auto searching the email address based on each character typed.
2. Improved message searching - better filters and more search options
3. Forward As - Forward and email as email, PIN or SMS option
User Interface/ Navigation
4. Themes are more user friendly and improvements on icons, graphics and overall look (You can download themes OTA)
5. Web browser not only load faster but the cache has improved significantly due to size increase and usage optimization. The loading status bar now has page size, image download progress (e.g. 2 of 10) and more.
6. BB Messenger gets new main screen icon
7. The Calendar, Task (Snooze option) Tasks with deadlines now show up in your calendar and BrickBreaker took on some minor improvements.
8. The Calculator is actually usable now! Check it out! (esp. on 7290).
9. New font face BBClarity
10. Overall speed improvement in loading and general device speed.
11. Compose icon removed - have to many icon on your main screen? He's one less. You now compose within the Messages section. Check and send in one place.
12. Saved messages icon removed - you nowaccess saved messages within the Messages menu.
13. Hide sent messaged - get rid of all of the sent check marks you may choose to hide them.
14. Download themes link added to themes in 'Options' / 'themes'
15. Download Images link added to Pictures menu.
16. Database sizes - going to 'options' / 'status' then pressing the trackwheel for the menu there's a new Database sizes option.
17. 'Options beefed up, while list simplified' - no more endless scrolling through options. Made more simple using sub categories.
18. Application Permissions - you can now set specific permissions for each application installed on your Blackberry. You can Allow, Prompt or Deny
19. Connections, Interactions and User data settings. Each having sub categories to expand.
20. Firewall settings more robust
Miscellaneous
21. Profiles - HUGE improvements. With the "Use Active Profile Except for: Important Calls" Your Wife/Husband will be glad for this when you're in a meeting and she has an emergency. Or you can just select to mute all calls from a specific number. Still in profiles you can setup custom these tones for specific numbers and also email of important family or associates.
22. Bluetooth now has Desktop Connectivity Wireless Bypass for wireless Desktop sync. Works on all confirmed models below.