BPOS team announced some cool features, such as: language support, smtp relay support and Exchange online Journaling. Check them out:
New Language Options for Microsoft Online Administration Center (MOAC)
The Microsoft Online Administration Center is adding eight new language options: Traditional Chinese, Simplified Chinese, Italian, Danish, Dutch, Finnish, Norwegian, and Swedish.
SMTP Relay Support
Exchange Online is enabled to support for SMTP relay, allowing SMTP-enabled applications to send e-mail via Exchange Online.
Exchange Online Journaling
Exchange Online journaling is enabled, allowing email to be journaled to third-party archiving solutions, including Exchange Hosted Archive. Journaling can be enabled by contacting Microsoft Online Services support and opening a Service Request.
Read more at source: http://blogs.technet.com/msonline/archive/2009/08/05/service-update-august-2009-release-availability-features-announced.aspx