TheGeekMystique

So, last week I received an e-mail from CU Boulder, inviting me to attend their open house on March 4th. It's not an offer of admission, but they did offer to pay for my travel/hotel expenses. I responded by sending them my info, as requested, but it's been a week and I haven't heard anything back from them. I saw on the results page that others also received open house invitations--have any of you heard any updates or responses from them? I'm getting nervous; it's difficult to plan for a potential visit when the department won't get back in touch with me. However, I'm not exactly swimming in offers, either, so I don't want piss anyone off by calling or e-mailing them again. Does anyone have some insight? Thanks for your help!