A piquant detail is in bold below. "Islamist Forum Member: Bush To Be Targeted During Visit To Saudi Arabia," from [1] MEMRI, May 11 (thanks to all who sent this in):

On May 10, 2008, a member of the Islamist forum Al-Ikhlas (hosted by Piradius Net, Malaysia) posted a message claiming that an "official in the Jihadi Intelligence Organization" has learned of a plan to assassinate President Bush.

According to the posting, members of a pro-Al-Qaeda cell from a Gulf country have undergone sniper training in a Western country, and "will lie in wait during [Bush's] upcoming visit [to Saudi Arabia]."