To those worried about their CC charge no longer being visible/pending, the same happened to me.
29th February - Ordered at :04, Credit Card
1st April - They held the funds.
6th April - Received shipping notifications from DHL Express that my Vive would arrive on the 11th ('Express' option, but never mind, HTC say they'll refund)
7th April - Received confirmation from HTC with tracking details
9th April - Pending charge had dropped off my account. Had a pizza.
10th April - Full charge taken from CC balance, as people are saying above, will have been authorised so was taken instantly.
Hope that information helps somebody, was very frustrating being left in the dark, and it was DHL who contacted me first to let me know what was going on. If I wasn't active on the Reddit thread I'd have had no idea.