Update: Today's the day. Sprint has added the update support pages for both the G3 and the G Flex. Some of you should be seeing the update over the next few days, with everyone updated in a little over a week.
If you're using LG's flagship G3 or the oddball G Flex on Sprint, expect some new software next week. According to an internal Sprint document, both phones will be updated with some minor software patches, version ZV26 for the G3 and ZV9 for the G Flex.