Turkey eggs

Why don’t people eat turkey eggs? Are they commercially available anywhere?

http://www.straightdope.com/classics/a980306b.html

Why can’t you buy turkey eggs in stores? Ask Cecil.

The farm shop just up the road from me sells them.

They are hard to crack; the shells are much tougher than hens’ eggs and the membrane inside is very strong and leathery; it’s almost impossible to crack them open without breaking the yolk (which is a shame if you like your eggs sunny side up).
They taste pretty much the same as ordinary eggs; the only real difference I noticed is that the white is much purer white in colour.

There’s another farm (run by a friend of mine) nearby that farms ostriches; they sell the eggs and meat there, I’ve tried the meat (mmmm, nice), but I’m waiting for a special occasion to sample the eggs as they sell for £10 each.