Wow, this one's pretty nice. The extra storage isn't too important -- two SD slots beat out one microSD slot and higher internal flash -- but 512MB is my memory sweet spot. Screen has much higher resolution than Pandora ([1024x600] / [800x480] = +60%). The actual killer for me is that Pandora will fit inside my pocket (sometimes awkwardly, in the case of tight jeans, but it'll fit), while this device might be just too wide to even fit in my work pants' pockets. The price hike is also a concern. It's basically $120 more expensive (I'm counting my bank's annoying $30 overseas wiring fee here) and will probably not be in the US by the time my birthday present arrives in the mail (first week of November is still a possibility, right?), or any time soon thereafter. Sharp's clamshell Linux embedded devices are usually Japan-only for the long haul, now that I think about it.
Still, the intro of this device makes it plain that big manufacturers will soon be able to match what the Pandora offers, save for analog nubs and soforth, which would be considered too niche to bother with.