Thanks @steevc, I have 7 now after adding another one for @trolleydave to help him along a bit.
The original ones I sent are now active, but how do we know if additional ones added later have been added too? There doesn't appear to be any further notifications after the initial one. A question for the sbi people I suppose.
Apparently there's a spreadsheet somewhere that lists them all. I've not looked yet. I may well nominate some more
I will look for it. If you vote up their article's then that adds to your stake. I don't know how it works. I think I will nominate some more later too, just need to get a few more SBD's in the coffers.