All existing APM customers on maintenance should have already received customer notifications for v3.5 in May, so this post is just in case you missed that announcement.
What's new in APM 3.5:
Application Dashboards – View the overall health of specific applications & take advantage of out-of-the-box dashboards for Microsoft Active Directory®, Microsoft® Exchange, Microsoft SQL Server®, IIS, Windows®, & Linux®
Shareable Application Views – Customize the way charts, gauges, & tables are associated with component monitors & share application views when you share templates
New Templates – Monitor authentication protocols & the latest MS Exchange 2010 server