Griffin announced a few new accessories for the Sony PlayStation Portable, helping bring the PSP a little closer to the iPod’s status as a “digital lifestyle hub”. The iTrip PSP ($49.99 direct) is an add-on that plugs into the bottom of the PSP and transmits the audio signal to any FM receiver. An LED on the front of the iTrip lets you see what frequency the transmitter uses, and you can select any available frequency via the buttons on the iTrip’s front. Another FM-based product, the iFM ($49.99), adds a remote control and FM tuner to the popular Sony portable. And finally, the SmartShare ($14.99) headphone splitter with separate volume controls has been slightly rebranded for the PSP (okay, it looks exactly the same… this one’s a head-scratcher).

So does this mean the PSP is stepping on the iPod’s little toes? As the PSP’s feature set is broadened by the addition of more accessories, it is becoming a more attractive platform, especially given its capacity for high-quality video and audio in addition to its core gaming features. Ultimately, though, I think the overall size of the product will be as crucial a differentiator as the feature set. But then again, who knows. Sony may one day decide to really gun for Apple and make a “PSP Mini” on this principle: If people are willing to watch an hour-long TV show on a 2.5-inch screen (like that of the iPod) and play games on their cell phones, it stands to reason that they’ll be willing to play certain types of games on a PSP with a smaller screen as well. And call me crazy, but I’m pretty sure something with the combined capabilities of an iPod and a PSP in an iPod-size form factor would make every kid and gadget-nut drool.

[Thanks to Mike Kobrin for writing this up!]