Try the following sites
gislounge.com/
http://www.esri.com/
http://erg.usgs.gov/isb/pubs/gis_poster/
http://en.wikipedia.org/wiki/Geographic_information_system

Hope the above info is helpful.

www.gisday.com
www.gis.com
www.gisdevelopment.net
www.directionsmag.com
www.geocomm.com
www.cadwire.net

etc..........

simpply go on to google n search

i have more website

www.avismap.com - gis products for try


http://www.javaworld.com/javaforums/
http://www.javaworld.com/community/
http://www.networkworld.com
www.pcworld.idg.com.au
http://www.pcworld.com
http://www.softwareceo.com/forums
http://www.canada.oodle.com
http://www.sanepr.com
http://www.directionsmag.com/industry/
http://www.govtech.com
http://its.ucsc.edu/
http://geocomm.com
http://mercantil.com
http://www.geoplace.com
http://www.gis-forum.info/
http://cowscorpion.com/
http://www.altech-ads.com/
http://download.goo.ne.jp/software/index.html
http://www.spatialhydrology.com
http://wvgis.wvu.edu/news/submitnews.php
http://www.rakuten.co.jp/
www.work.com
www.blogger.com
www.gisdevelopment.net
www.cadwire.net
www.business.com
http://www.mapforums.com
http://www.kaldata.net/
www.feedsfarm.com/
http://www.tech-updates.com
http://findgis.com
http://earthref.org
www.bnet.com
www.tigris.org
www.BeKeen.com
ww.digg.com
www.macrumors. ...more

Hi Sree,
I am giving you some sites here:

www.gis.com
en.wikipedia.org/wiki/Geographic_information_system
www.gisdevelopment.net/
www.geo.ed.ac.uk
gis.nic.in/
You will get more sites...