"We feel it's important to reach out and engage the new social media, and bloggers are a significant part of this new media," department spokesman Robert A. Wood said. "It's essential that the work of the State Department be disseminated as widely as possible, and they help get our message out."
One of the two, Fadi Abu Sada, was not allowed to enter Egypt. As a Palestinian under the age of 40, he needed an Egyptian visa, and had failed to get one. The other, Daoud Kuttab, was good to go since he's a Palestinian over the age of 40. And, although the above press report doesn't mention it, he's also a naturalized U.S. citizen, so I assume he could have entered Egypt on his good old U.S. passport.
Here's the report by the last Palestinian blogger left standing at the conference: My short meeting with Secretary Clinton.