Given that the site's focus area is Arduino, creating tags such arduino-uno does not seem to me, as ideal. I think that just the board name without Arduino prefixed to it is sufficient, as the Arduino in the name is implicit.
So, should tags be of the form arduino-boardname or simply boardname? Eg, arduino-uno vs uno
I disagree removing the arduino before the name of the board.
Exist a lot of Arduinos that could make some troubles in tags, if we put just the name of the Arduino like:
Exist many possibilities to have a tag ethernet or robot that don't have anything to do with the Arduino Ethernet or with the Arduino Robot.
Even the Tags mini, micro and nano would be confusing just with this.
I think that putting the word arduino before the name of the board will be more organized.
The tags should be named uno, mega, etc., so long as the board in question is an "official" board. Using arduino-uno would be like a tag called math-arithmetic on Math.SE.
The arduino-boardname tags should be made synonyms, too, for the boardname, in any event.
I agree with Butzke that there can be confusion about whether or not the tag means the board. There are even three ethernet questions already. However, it is unlikely that uno will be mistaken for anything other than the Uno board. I propose that some boards, such as the Uno, Yún, Duemilanove, and Esplora should have not have arduino in the tag name (arduino-duemilanove can't even exist; it's five chars over the limit), but others, such as Ethernet, Micro, and Robot should.
Based on the answers given (Thanks @Butzke!), I felt it prudent to create a tag list of sorts for all the official boards. Feel free to add any missing board with the desirable tag name. If you disagree with any of the tag names, please mention so in a comment.
All variations of the board name will be synonimized eg. arduino-uno will map to uno. This list is for the tags that will be visible to users eg. uno, once the synonym is established.
