Not with version 8.x - scheduled reports there are PDF only.
9.0 has a re-worked reporting engine (which against is getting reworked in SP2), and I seem to recall from the user group demo of it that you could schedule non-PDF formats, but I'm not 100% sure on that count. Talking about the SP2 reporting engine here, in case it's unclear.
But in 8.x at any rate, for sure, there's no functionality for this - it's one of the many reasons why a change in reporting engines was deemed necessary.
- Paul Hoffmann
LANDesk EMEA Technical Lead