Best way to reduce panorama file size?

I'm a wedding photographer and took 35 RAW files that I edited in Lightroom and exported to 100% JPEGs..then I stitched them together using AutoStitch (or whatever it is called now) and rendered it at the default settings except I think I may have changed the PPI to 300. Then I took my new JPEG file and did some work to it in Photoshop and then saved it as a level 10 JPEG.

Ok, so now i'm left with a 100mb JPEG file that is about 360 megapixels. Along the way i've been trying to preserve as much quality as I reasonably could, but now i'm trying to figure out my options for reducing the file size and still maintaining the ability to print it very large if need be.

What are my options???? Thanks!

Yes, panoramas get very large very quickly. You really only have two options if you want to reduce the size. 1. You can subsample the image using Image Size in Photoshop. 2. You can save at a lower level of jpg quality. Unless you are making very large images, I would recommend #1, as there will be no visible image degradation until you drop below 200-240 pixels per inch in the final print. Hope this helps.

100MB isn't really that big, disk space is cheap, just keep it like that. If you want to share it just resample it down to 2000 pixels or whatever, Q7. To print it just resample it to the correct size - eg 30" means 30"x300ppi = 9000 pixels wide.