When I export a set of images as jpeg from LR 1.0 (windows), the exif data in the jpeg has the _export_ date, not the date of the original photo. This is unexpected and unwanted behavior.
I export jpegs which are then uploaded to a photo sharing site, and imported to other locations as well. The images exported from LR all end up as having been taken 'now', because I just exported them.
This is not how Camera Raw behaves!