The main place to get help is the official support/news subreddit, /r/olkb - the community is great at jumping in to help out others, and Jack comments on things when necessary. If you have a question specifically for Jack, there are weekly question threads where you can ask questions.
If you're curious about the status of your order, check out the weekly question thread, and post your order number for your current position in the shipping queue. Unfortunately that's all the information I give about when things will go out - my schedule changes a lot from week to week.
Changes to orders
If you'd to cancel or change something in your order, please email me directly with your order number, and I'll get things taken care of as soon as possible.