Thanks for the info! So the donation BTC are basically gone, and the donators don't get any XEL.
So where do the XEL people are pre-selling come from?
The donations were registered in XEL genesis block, and they are valid. The genesis block will be used for redeeming XEL once we have mainnet (hopefully soon).
Selling now is impossible - you can treat those offers as, well... market pre-screening :-)
If lite wallet will come up, those offers can be also used for OTC transactions.
Is there a place where the genesis block with the public keys can be seen?
If access to XEL will be granted using the private key that was used for the donation BTC, does this mean that if I buy a XEL share from someone, I cannot be sure if the owner sells to multiple people, because the key cannot be changed!?
There is list on this forum, I just can't find it now... try to search on earlier pages, before all the votes posts.
When you buy before mainnet launch, the one who sells you, still control his privet key and can take the XEL's before you, after mainnet launch - so take this into consideration.