The word from the DAL schoolhouse is that the fellow that rationalized the DAL network in bankruptcy (stoped flying a lot of widebodies domestically, and shipped them to international,) is looking over the NWA fleet and schedule, and believes many of their aircraft are seriously under-utilized. It wouldn't surprise me to have the 9's deployed on current routes running a high frequency of pakced RJ's, as someone else mentioned.
Thus far I've been impressed with the way DAL management is navigating this downturn. If plans remain as they are, I don't think anyone under the DAL/NWA umbrella will have to endure a furlough - and I think the management is planning on the economy and fuel getting worse before it gets better. Not to say that plans couldn't change, or that you shouldn't have a plan B - but as of right now, a furlough looks unlikely.