We made a discovery earlier this year when starting to develop our first customer projects on SharePoint 2010 that the DataContext does not extend over multiple site collections in SharePoint context, while it does so out of the mentioned context. This means you can’t develop customizations on SharePoint 2010 using LINQ to SharePoint over

PowerShell might be a new beast for many SharePoint administrators. Microsoft has been helpful by providing hundreds of commandlets with SharePoint 2010. However, when the commandlets have names such as Start-SPEnterpriseSearchQueryAndSiteSettingsServiceInstance, remembering the correct commandlet can in many cases be impossible. Using tab key for autofill  is not very usefu, considering the commandlet naming conventions.

Luckily the PowerShell basics are here…