Ethernet converter is my own made up word; I'm just talking about a device that converts ethernet into 802.11 wireless ethernet.
This would be an example, albeit a crummy one. They seem to be fairly hard to find.
A, B, G, and draft-N are different types (and speeds) of wireless. You need to know what you have before you go out and buy a wireless router. A is in the 5GHz range and tops out at 54MB/sec. B is the generic, 2.4GHz range, tops out at 11MB/sec. B is the common denominator; just about everything that's wireless supports this. However, if it's used on a network, it slows down everything else, so you probably don't want B equipment on your network. G is 2.4GHz, tops out a 54MB/sec. 2nd most common; A is fairly rare. draft-N is 2.4GHz or 5GHz, topping out at something like 200MB/sec. Fairly rare, not a certified standard yet, but increasing in popularity. Theoretically long range.
Here's a review of current draft-N routers.
EDIT: teach me not to use preview...
