I think the original question is about: transferring existing airline-miles into hotel-points - isn't it neyoisles?

and than - to my knowledge - pgupta011 is right: we know only the HHonors program (and may be the just announced Diners 3-months-promotion: UA to Diners to Hilton or others? I don't know the details of the US-Diners-program).

Have a look under the Diners-topic.

[This message has been edited by Rudi (edited 03-01-99).]