Exchange Team announced that SP1 for Exchange 2010 is coming with a lot new features
I highlighted the things with I like from the coming update. It’s a whole list but i thing with this update is Exchange 2010 SP1 the best version ever!!! 
A list of al new things in Exchange 2010 SP1:
Archiving:
- Personal Archive to a different mailbox database from their primary mailbox
- You can import historical e-mail data from .PST files, directly into Exchange
- delegate access to a user’s Personal Archive
- SP1 updates the Exchange Management Console with new tools to create Retention Policy Tags
- support access to a user’s Personal Archive with Outlook 2007 Coming with A update
Outlook Web App
- Delete, mark as read, and categorize operations running asynchronously, these actions feel instantaneous to the user
- Attaching a very large file, will not block the rest of the OWA experience
- Sharing calendars to anonymous viewers via the web if you enable this.
- OWA themes back
- Reading pane can be placed on the bottom or the right side
Mobile:
- Support for send-as
- Support for notifying the user if their device has been placed on block or quarantine by their admin
- Full implementation of conversation view
- To sync only unique parts of messages.
- Setting up mobile device to access mail via POP/IMAP/SMTP, information is available in OWA.
New Management UI
- Create/configure Retention Tags + Retention Policies in EMC
- Configure Transport Rules in ECP
- Configure Journal Rules in ECP
- Configure MailTips in ECP
- Provision and configure the Personal Archive in ECP
- Configure Litigation Hold in ECP & EMC
- Configure Allow/Block/Quarantine mobile device policies in ECP
- RBAC role management in ECP
- Configure Database Availability Group (DAG) IP Addresses and Alternate Witness Server in EMC
- Recursive public folder settings management (including permissions) in EMC
Read the whole article at HERE.
