I was just looking to find out if there was an alternative to waiting for your turn in the queue to download the update. Offering a download online makes it a free-for-all with generally enough bandwidth to serve all your customers at once. There are probably the in-between geeks who will do a manual install but may not necessarily want to bother with the magic bits.

For the average customer, the OTA is the best idea because it will just happen on its own sweet time without them having to make a conscious decision to go download, then update/sync.