Sarah, wouldn't it be better to set up a YDC Twitter Account, instead of tweeting using your own one?
In fact same for Facebook as well.
Obviously I hope eBid themselves eventually set up both for the site,
Oops
I see they already have a twitter one.
http://twitter.com/ebid
but the YDC ones should be set up by the YDC Organiser , that way the accounts can be passed on, if necessary.