A few hours ago, googling Zepfloyd led to the Twitter profile below:

However, this has now changed: PreCentral reports that the code names Marmotte and Zepfloyd were found in the Palm webOS ROM.
As of now, no further information is available – stay tuned!
Related posts:

I seem to recall that ZepFloyd was/is the name of the original development platform, which looked quite like a Treo 800w.
Hi Chris,
got some photos maybe?
All the best and thanks for talking back
Tam