Allo GreatNate
The sunlight won't do any damage, although the sun's glare might make seeing the screen hard/impossible.
The only other way that the sun might harm the system, is the heat from the sun might cause a temperature build-up in the case - Black cases absorb heat more than any other colour.
You can monitor your PC's temperatures with this nifty bit of freebie software -
Speedfan. It will 'Auto-sense' what temperatures can be monitored and display them in the System Tray
