Hans wrote about a different way of preparing a bootable USB stick for a Fedora installation then I did in Installing Fedora 9 from a (small) USB stick.
Unfortunately, his blogpost is set to only accept comments from "friends" and does not even accept the Fedora OpenID url as a "friend". :-( Thus I'll reply as an article:
While my recipe wrote the data directly onto the USB stick without creating any partitions ont it, Hans suggests to format the USB stick similar to a normal hard drive with a Master Boot Record and a single partition holding the data. This is based on the hope that it makes it more likely that the stick is in fact bootable.
Fedora, and in extension Red Hat Linux before it, has always created partition-less diskboot.img files. The commands I listed in my article are taken directly from the sourcecode of the anaconda-runtime scripts, which have in the past generated the shipped diskboot.img file.
I might not remember the exact date but I'm certain I've been booting installation images from USB sticks for more than 5 years now and never had a problem with the partition-less disk-image as found on the installation CDs in the /images-folder.
In fact, I remember some problems with an older EPIA-M board which absolutely refused to boot from an USB stick formatted as either a hard-drive or a ZIP-drive with the data contained on the 4th partition.
But that was in 2003 and I'd really expect current BIOS implementations to correctly boot from whatever disk is plugged in. Yeah, right...