I've been playing around with SharePoint 2010 SP1 for the last couple of days and have noticed two things that I thought were worthwhile sharing.
PerformancePoint Service Application now supports specifying a database name at creation time (no more GUIDs) and includes support for SQL mirroring. Here are the new parameters for New-SPPerformancePointServiceApplication in all of their glory!
One thing to point out about this (well two actually) is that if you delete a Site Collection using PowerShell, for example by running Remove-SPSite http://sp2010/sites/sitecollection the site CANNOT be recovered using the Get-SPDeletedSite/Restore-SPDeletedSite PowerShell cmdlets.
If you delete a Site (Web) using PowerShell the same is true, for example if you run the following command Remove-SPWeb http://sp2010/sites/sitecollection/site it's not possible to recover the Site using the Site Collection Recycle Bin.