Here's some notes I took, about the XML realm status page (http://www.worldofwarcraft.com/realmstatus/status.xml), which is parsed by an XSL stylesheet (http://www.worldofwarcraft.com/realmstatus/realmstatus.xsl).
http://www.worldofwarcraft.com/realmstatus/status.xml
Example:
Tag: <r n="Aegwynn" t="2" s="1" l="1"/>
Name: Aegwynn
Type: PVP
Status: Up
Population: Low
Tag: RS
-- Contains R tags.
Tag: R
-- Param: N - NAME
-- Param: T - TYPE
-- -- 1 - Normal
-- -- 2 - PVP
-- -- 3 - RP
-- -- 4 - RP-PVP
-- Param: S - STATUS
-- -- 1 - Up
-- -- ELSE - Down
-- Param: L - POPULATION
-- -- 1 - Low
-- -- 2 - Medium
-- -- 3 - High
-- -- 4 - Full (Queued)