Just rode to work this morning and found my '03 800ie idling at the 500-700 range, even when warm. Yesterday, the idle was fine in the 1000-1100 range. The idle sounds normal, and the bike is riding fine. Any ideas? :
Sounds normal to me. I start at over 1000, then back off as I add miles. When reasonably warm, my 620 likes 6-700, and will sometimes settle down to 500. But I'll occasionally come to an intersection and find it back over 1000.
Sometimes an inconsistant idle can be caused by a lean condition - it can also be a variety of other things & can be tricky to cure. If it doesn't bother you, I'd forget about it, if it does, have someone start messing with your idle circuits.