I participate with same program (Rewardsnetwork.com) but use it through Delta. The restaurants are exactly the same as Hilton. I don't think that I can double dip with both programs, but should probably look into that. Luckily there are a couple nearby places that we visit once in a while so I do get a little value out of it. When I travel (almost weekly) I use my phone to locate nearby restaurants that participate, which gives me a chance to try places I might not have considered before. For the most part I've had good luck with that and am up to 26k Delta points from the program YTD.

As far as points posting, I see them on my Delta account roughly 2 weeks after dining. But Delta posts all my points faster in general than Hilton. I'd say give them at least 1-2 more weeks to post.