It certainly looks like the PlayStation Portable is more than an optional in-game tweaking device for the PlayStation Home, PS3's virtual world. Sony Computer Entertainment's (SCE) marketing boss John Koller has revealed that they have something in store for the PSP in Home, enabling them to experience Home on the go.
There is still no official word about Sony PSP's inclusion into the PlayStation Home network, but Koller has already hinted that it's quite natural to have the PSP as part of this virtual world. "Intuitively, if you take the PSP with you, you would want to take some of Home with you," he said.
On a related note, he also gave a few tidbits regarding the redesigning process of the PSP:
We certainly looked at the area below the [face buttons on the right side of the PSP] for a second analog stick, but we thought the issues far outweighed the benefit we'd get out of it.
So they really did consider the inclusion for the second analog stick, and found that there's not much reason to add it into the redesign. Sorry, Me and My Katamari Fans, looks like we're stuck with mashing the D-pad and the directional buttons in rolling that Katamari.