Question: If the HP Prime is eventually hackable ("HelPless" or "HPless" instead of "Ndless"?), do you have any plan to port this to that calc since it has a similar processor?

I don't know about the rootfs issue, but I use this usb hub along with this cable.

Until proven otherwise (assuming it ever is), the HP Prime is a closed platform, like its closest ancestor the HP-39gII is. Arbitrary code execution exploits, and a framework for user native code programs, are necessary in that situation.

Once arbitrary code execution is achieved, if user interest is sufficient, an initial port of Linux is usually performed in several weeks. One of the clearest indications that the Nspire is not a cool platform to program on (no wonder, given the hardware limitations and the severe overpricing...) is the fact that it took more than two years from initial arbitrary code execution to an initial port of Linux, three years and a half between initial arbitrary code execution and initial mainline Linux integration.
With slightly less outdated hardware and a touch screen, the timeframe for Linux running on the HP Prime might be lower, we'll see.

It's supposed to have 32 MB, i.e. the same as '2007 Nspires, and half of '2011 CX Nspires. But it's supposed to have a CPU 3x faster than the CX's CPU, and twice the amount of NAND Flash memory the CX has.

The calculator isn't released yet
And before anybody can port Linux to it, we'll have to look for arbitrary code execution vulnerabilities...

As long as HP is civil about programming support, hacking may not be required.

As long as HP is civil about programming support, hacking may not be required.

Yeah I wouldn't be surprised if they let us hack their calcs if we play nice. As Streetwalker refers to, Casio didn't add native code support to the Prizm, but they didn't spend much effort locking it down yet, due to the lack of cheating tools. If HP added teacher modes to their calcs and hacking the calc compromised the restricted mode, then they'll most likely have a problem with it.

That said, unlike TI and Casio, it seems that the Prime has a very good BASIC language that can act as alternative to ASM for some games and softwares, much like the 39gII.