Is there a way to generate a SolarWinds Interface graph as a standard image format via the SDK?
Not through the SDK as such, but you can request a chart image using a URL like this:
http://oriondemo.solarwinds.com/Orion/NetPerfMon/Chart.aspx?NetObject=I:5089&ChartName=NetworkAvgRT&Width=640&AccountID=guest&Password=orion
You can search thwack for "Chart.aspx" to find more examples.
Oh I long for the day we can add groups of charts to a page much like app
Insight does. Or Splunk.