Hugh Hewitt:

I realize that I did not say this about Senator Vitter, but Craig's behavior is so reckless and repulsive that an immediate exit is required.

Kevin Drum, noting that a Vitter resignation (unlike Craig) would likely produce a Democratic senator, says:

Lots of conservative bloggers, following Hugh Hewitt's lead, have called for Larry Craig to resign even though they didn't call for David Vitter to resign when he was outed for visiting prostitutes last month. [...] Of course conservatives are turning against Craig secure in the knowledge that they're running no actual political risk.

Tammy Bruce:

Well, not only are not all gay men engaging in tawdry bathroom sex with strangers, not all gay people think "hate crimes" legislation is good idea, either. Some of us would rather not become the establishment Thought Police, with laws that position some people as more equal, more important, than others.

Boi From Troy:

Meanwhile my straight friends are having trouble understanding that tapping one’s foot would constitute a solicitation of a sexual encounter. I had to explain that from places like Frankfurt Airport in the tunnel beteen terminals B and C on the train station level below the USO to the USC Campus on the second floor of Waite-Phillips Hall, some restrooms have a reputation of being cruisy and any such gestures can be interpreted as such…especially for those who were around before the internets were the main vehicle for arranging anonymous sex.

Roger L. Simon:

Human sexuality could be called the world's epicenter of hypocrisy. And the intolerance of this gay man in the Senate toward other gay people is mean and almost sadistic. He should resign, not for his behavior in the bathroom, but for his creepy political phoniness.

And Glenn Greenwald has a post too long to bother excerpting, filled with quotes and links from right-wing commentators (including Jonah Goldberg) from before the November 2006 election, after Craig had been "outed" by journalist Mike Rogers.