just below the graph with your purchases you can see smth like this:
Batch Date Amount
Batch 4 Coming soon xxxxx WTT
Aah, I see. I have already got my tokens. I guess I was in Batch 2.
Go and put them at work on your Giga-Watt.com Account.

Wow, I didn't know this. $hit!!!
BTW, this is really silly, but first I'll have to send Ether to my cryptonomos wallet to withdraw my WTT to pay the transaction fees? Correct!

NO. You can send from cryptonomos to GW without any fees. Just go into your GW account, into "receive tokens" section, and choose "get from cryptonomos" by ID.