Best places to send photos, negatives, and film to be digitized?

My cousin died a few weeks back. He was the last in his family and my older sister is in charge of his estate. He'd left his mother's house untouched since she died several years ago. My sister found boxes and boxes of snapshots, negatives, and a number of rolls of 8mm film. She dumped them on me since I have been scanning family photos and expects me to scan all of these.

I simply don't have time to do this. I am still working on organizing and putting the family photos - many going back to the mid-1800s - so I can put them online for the extended family to see.

So I want to send this stuff to a service that can digitize all of it. My sister still expects me to organize the most interesting pictures and get them online, which will take a lot of time. But if a scanning service can do it, it will save me years of scanning.

Any suggestions?