We're in the golden age for software development. I prefer an "open" solution like the Beagleboard but I received an R.Pi v2 for free and have made it part of my low-power dev environment. I'll describe this environment for the amusement of ye 'dotters.
I installed a $10 hardware clock in the R.Pi and I power the it with a spare power cord from an Amazon Kindle.
I run Raspbian (Debian) with Icewm DE. I use the R.Pi for coding (Java, C++, Perl, Go) and I push Mercurial updates to a code repo on a Sheevaplug running Debian Wheezy. The Sheevaplug's power supply had failed (typical problem, melted capacitors) but I wired the mainboard to an AC adaptor from a USB hub.
I've overclocked the R.Pi to 900MHz. This isn't enough CPU to browse the Internet directly from the R.Pi with Iceweasel/Firefox, but Midori and NetSurf work well enough. On a Pogoplug V2 (running Debian, you see the pattern here), I have lighttpd and a Perl program that fetches and summarises RSS feeds for me. I can view the RSS summary from the R.Pi using NetSurf or Midori. (Dillo doesn't do tables well.)
When I need to do Web research that requires Flash or special plug-ins, I use rdesktop to connect to a VM instance of Firefox (M-Windows XP or Debian) installed on an AMD box running VMware ESXi server. ESXi server is free.
I have all this running with an APC battery back-up. The APC unit can run for some time with only the ARM kit to power. I have another APC UPS feeding my modem, router, and assorted switches.
It's a versatile dev environment and it didn't cost much. None of it would be possible without Linux. I'll say it again: this is a golden age for software developers.