It would be really nice if Starwood could do this with all hotels automatically. Marriott has an opt-in for an e-mail folio available to Marriott Rewards members. Hilton has a system where a folio is available in PDF form under your Hilton HHonors account on their website after the stay for 12-18 months.

I think a lot of business travelers would really appreciate Starwood doing something similar for SPG members, as it really helps with doing expense reports and provides a nice backup if the original folio is lost — or if charges are posted after the printed folio provided under the door on the last morning, or at check-out, was printed.