http://mixpanel.com/
Web action analytics. Tracks events rather than pageviews, so users clicking "Like", etc. All data in real time, detailed analysis, retained >3yrs. Pricing is free up to 25k data points, $150 for 500k, and upwards. Interesting.
http://toutapp.com/
Tools to automate and track the success of repetitive emails. Insteads of copying / pasting the same pitches in email, use tout and track response, opens, clicks, etc on all the different templates. $30/month for 1 user, $50 for 3, $100 for 10.
http://newrelic.com/
A system to monitor multiple aspects of a live application in production including the page load times, server load times, mysql response times, javascript render times, and so on. Expensive.
http://shop.delorme.com/OA_HTML/DELibeCCtpSctDspRte.jsp?section=10741&beginIndex=&forge_prod=56bImlpDun7piC7ymi3IfRHE:S&forge_prod_pses=forge_prod%3D56bImlpDun7piC7ymi3IfRHE%253AS%7E
GPS sat nav handheld devices with built-in spot messenger functionality. Epic! Starts from $550. Ideal for the true outdoor adventurist. Twitter just went global.
http://www.findmespot.com/en/
A small satellite pager ($170) which offers tracking service ($100/yr) and a mapping service (map your location, $50/yr) and other emergency contact features.
http://www.trackle.com/
Track a whole bunch of stuff online, automatically. Seems to be an RSS aggregator on steroids with a catalogue function built in so you can "shop" for feeds...