So far so good on my new HP Chromebox!
Performed the reset procedure, removed the write screw, ran your script and got OpenELEC installed... then got all my network shares going and built the library, copied the Confluence skin so I could edit it, created a SAMBA link to the /addons/ directory, and got my custom home screen running.
I've tested the Rosewill RHRC-11002, which includes a small whistle-shaped dongle (model IR605) that fits on the front of mini PCs like the NUC and Chromebox, and as far as I can tell it seems to work fine. It will resume from suspend, although it seems to require a bit longer of a keypress than normal to actually wake up.
Here's a photo:
Note that the Rosewill remote is garbage - tiny keys, bad layout, poor repeat performance. But use the receiver with a universal remote or a "real" MCE remote, and the performance is quite good.
If you plan on using the Chromebox with an IR repeater system using stick-on IR emitters, the dongle IS small enough for the back panel USB ports, squeezed between the HDMI and network cables, for a very clean installation. Further, if you use the top port, it leaves just enough room for a slender USB plug to be installed on the bottom port.