Your description is a little vague, so I'm not exactly sure what you mean by "wrap the app for our Facebook page" but I have experience with developing Facebook apps, and of course JS/HTLM5/CSS. I don't foresee any problems helping you with this project.
Feel free to contact me if you have any questions, or want to provide more info on what you need done. Oh, and Marlo is king ;-)
Bryon