Just give them some ideas,my husband is planning mine and I gave him some ideas just so they know what you'll like ,but its good to know you dont have to do it its relaxing to just show up and have everything done :)
Lol ok I'll do that... yes i know i planned my sister's shower i can't imagine trying to plan a wedding and a shower....
I would just ask if they have a date, time, and place yet. You could just tell them your family and friends are curious and it woukd be helpful to know. It's nice that they're planning it for you and I'm sure a big relief. I'm trying to plan my baby shower and my wedding so it can be hectic! Lol