I have absolutely no problem with anyone posting about their entry and asking folks to vote for your idea. After all, it isn't as though you have some sort of hypnotic power over your readers where you can force them to enter!
And from a blogger's point of view, I think it is a wonderful opportunity for some of your readers who may not have normally visited my blog to pop on over and check me out. Maybe they will like it and stay a while.
There are several other bloggers who have done the same-you can see the links at the bottom of the post. And then there are folks on twitter asking people to vote for them. People who do not have the platform of a blog or a twitter account are welcome to email all their friends and family and ask them to vote as well.
Hope that clears it up. see ya on twitter.
Jenn @ Frugal Upstate