Not sure what white buds/raspberries are. If the bloom buds that will show white just before opening are starting, you are still a long way from ripe raspberries. A beginning raspberry will be tiny, green, and look just like a raspberry.

The 2008 Farm Fresh Produce Guide is useful for the Portland area.
this links to raspberry sources

It could be a tricky year. Last year was fine, but in 2006 we were picking at Hartnell's on July 4th, trying to avoid moldy berries.

My raspberries are tiny, green and very unedible. If yours are white, then yours are probably just a stage earlier than mine. We're in a La Nina weather pattern, which means cooler than normal temperatures up until October. I'm tacking on an extra 3-4 weeks on my harvesting timelines.