If i want to get the Features that are activated on a WebApplication, i can use the SPWebApplication.Features property, which will return a SPFeatureCollection with the Features activated for the WebApplication.
If i want to get a collection with the Farm-scoped Features that are activated on a SharePoint-Farm, there is not an easy way (as in the above for WebApps) to achieve this, since there is no 'SPFarm.Features' [or similar] property.
So how do i get a collection of farm-scoped features that are activated ?