I have not ordered from them for a while, but they used to have a section on their website with anticipated processing times for orders. The last time I ordered from them, it was stating to allow 2-3 days from the date the order was placed before looking for shipping information. Every time I have ordered from them, I received a shipping notification within their stated processing times.
If it were me, I would give it till tomorrow before I contact them. The one time that I did contact them about an order (my first order from them) they responded in a timely manner via email, and I received a shipping notification later the same day.