Totally agree that with such services the price is steep and quality at best average. Advantage of course is that the members can select a dozen photos that are well tweaked and sorted, have them loaded centrally and choose to pay and print if they want it.
I once looked into this before for Jeeps (another love of my life) and was frustrated by the logistics of a calendar produced in one place and then having to ship globally and the 'me too' who were int he line to buy then never got around to ordering or paying.
Don't let my experience taint the Z4Forum 2008 calendar