I feel your pain. I'm waiting on a tarp as well. I didn't receive an email confirmation on the order (except from PayPal), so after a couple of weeks I emailed to check on the order. I didn't hear back, so I waited about a week and called. Adam informed me they were waiting on a shipment of Cuben. He asked when my trip was (this weekend). He said he'd push mine to the front to get it in time for the trip. It was a good trip (without the tarp). I sent another email, but still nothing.
I hate feeling like I'm nagging them. I do understand how hectic a small business can be, but communication is key. Just throwing out my latest experience (I do have a good experience with them in the past) as I try to wait patiently so you know it isn't just you.