Astronomy, Photography and Weather

Check out these links to find out if there's any lightning near you.

Stormtracker. This is one of the most accurate in the UK.

http://liveweather.stormtracker.co.uk/uk1minute.php

Isle Of White Sferic Detection. This comes with cool sound effects to alarm you of lightning.

http://www.isleofwightweather.co.uk/live_storm_data.htm

Live Lightning Data

http://www.jbest.net/weather/weatherLightLive.aspx

ATD Sferics - Lightning During Past 24 Hours

http://andvari.vedur.is/athuganir/eldingar/sferics/today.html

World Wide Lightning Location Network

http://webflash.ess.washington.edu/

Martin, you may add this link to your post, it is a good one imho:
http://www.blitzortung.org/DF/Webpages/ (Lightning activity during the last hour - Europe, Atlantic & USA)