i have emails and tasks setup on mac entourage please suggest me any software how can i sync my Blackberry with entourage ..?
please let me know the names of the software i'll be thankful to you .

Email does not sync. Email accounts will not move over either. You will need to set them up in BIS. If you are on a corporate BES, then you need to speak to your BES Admin to get set up and learn about what the company does and does not allow via IT Policy.

Calendar and contact info will sync with the BB using either PocketMac or Missing Sync. A Mac version of Desktop Manager should be out sometime this month. It is currently in Beta. You can doa search or look in the Mac User's section for more info.

If you sign up with a 3rd party BES provider, you'll get it working. I've been with link2exchange for several years and am pretty happy.