I presume you mean "powered by a Pi". Even so, it might vary by board revision a bit. The Rev. 1.2 (IIRC--the one with zero ohm resistors for the USB ports) didn't have the diode in question. Evarlier and later revisions do have the diode.
(Hmmm.... If we're not careful, some of us with collections fo Pis of different revisions are going to have an interesting time seeing what works on which board and what doesn't...unless we "retire" the older boards.)
I just want my next Pi (well, not the one I ordered three days ago, of course!) to have a "safe power down" button. It can be one of those teeny tiny buttons you have to click with a pencil point or whatever.
"Safe power down" would be "sudo halt" or equivalent. A button would give you a way to power it back up without popping the power connector--which would be real nice. FYI...the Cubieboard really does power down when you halt it and it has a button that will fire it back up. Dunno if the BCM2835 would support that functionality or not.
A plug-in real-time clock that just works? I'd buy that right now... The other guys call it "plug and play". I don't know what Linuxites call it- if they need a name.
I *think* all that would take would be including a driver in the standard kernel (or a loadable driver on detect). basically, the driver would have to be distributed.
Well, while I'm dreaming, it may as *well* fit in an Altoids tin, lined with craft Foamie sheet for insulation and shock resistance... Why the fine people at Altoids have not come out with a Raspberry Pi-sized case, I'll never know...
Oddly enough, the Beaglebone Black (aka BBB) *does* have rounded corners and it appears that it would fit in an Altoids tin. If I ever got a BBB it would be specifically to do just that. (The BBB doesn't have any "must have" features for my uses, and the graphics system is decidedly lacking for my uses, but a "computer in an Altoids tin" would be kind of cool. At least I already have a Dremel tool to pull it off...)
And if it only had connectors on two sides, I wouldn't cry *very* loudly. Only one USB port? In this world of tiny cheap hubs, what's the difference? it doesn't even need to be a standard full-sized USB, for a lot of purposes...
I tend to find that "cheap, tiny hubs" are cheap in more than one way, and most don't have a power supply (and may not even have a power connector). When they do have a power supply, it is far too weak for proper operation (a 1A supply is clearly inadequate for a 4-port hub; it's barely adequate for 2 ports).
I have, but haven't tested yet, a relatively inexpensive setup, though. Monoprice has a $3.50 4-port hub that is about a 3cm cube. MCM has a 2.5A 5v supply for about $10. A local "old time" (they still carry tubes..."valves" to our UK cousins) has a nice line of converter cables for various barrel plugs for $2.50 each (the MCM power supply is a 5.5mm, while the hub takes a 1.3mm...), and I have a suitable adapter. Next time I'm in there, I need to see if they have a 5.5mm barrel to micro-USB, They probably do..and if they don't they can order it for me. A Pi should not be able to drag down the voltage of a power supply intended to give 2.5A...
MicroSDHC cards instead of regular? Fine.
Doable now. Adafruit microSD adapter.
Even better if it will take the new 64-gig ones- so many gadgets say that 32 is as far as they go.
I think someone listed having successfully used a 128GB card on the Wiki. Been a while since I looked... And cards go to 256GB. Only problem is that it really feels wrong to use a $400 card in a $35 computer.
Still...if you really *need* a ton of storage, take a look at the Cubieboard. It has a SATA II connector and can power a 2.5" drive directly, or a 3.5" if you have an external power adapter. I have Cubies set up using reconditioned 60GB SSD drives that only cost $50 each (and I think a 64GB SD card would be a good bit more than that, and it'd be a lot slower).
A second one for data, not booting and basics?
That would definitely be a "nice to have". I rather doubt the BCM2835 has an interface to that, though.