No. We always need a link to the blog, because
a) we get a lot of wrong visits, so we have to make sure we're talking about a wp.COM blog,
b) often we have to check things in the blog itself in order to give an answer that applies,
c) although sometimes the nick is also the blog name, this isn't always the case, we are not oblidged to try it, this way you don't help us help you, and it's not safe anyway (sometimes a volunteer gives a reply only to be greeted with "oh not that blog, the other one!).
So please paste the exact URL of your blog when asking questions - or link your nickname to your blog as explained in the Sticky 8 Things to Know.