Wireless 802.11 a, b, g, n, y...?

There has been some confusion about the differences between these technologies. Here's a table to clarify the differences:
 

Protocol	Legacy	802.11a	802.11b	802.11g	802.11n	802.11y
Release Date	1997	1999	1999	2003	est. 6/2009	est. 6/2008
Op Frequency	2.4 GHz	5 GHz	2.4 GHz	2.4 GHz	2.4 GHz 5GHz	3.7 GHz
Throughput (Typ)	0.9Mbps	23 Mbps	4.3 Mbps	19 Mbps	74 Mbps	23 Mbps
Data Rate (Max)	2 Mbps	54 Mbps	11 Mbps	54 Mbps	248 Mbps	54 Mbps
Modulation Technique		OFDM	DSSS	OFDM
Range* (Radius Indoor in meters)	~20 m	~35 m	~38 m	~38 m	~70 m	~50 m
Range** (Radius Outdoor in meters)	~100 m	~120 m	~140 m	~140 m	~250 m	~5 km

*Depends on number of and type of walls signal must pass through.
**Loss includes one wall.