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A few years ago Shawn Frayne came up with an ingenious way of generating electricity on a smaller scale than wind turbines by using vibrations rather than rotary power. His invention, called the windbelt, works by oscillating a pair of magnets through a metal coil at the end of a belt which vibrates as wind passes over it. This physical phenomenon is know as aeroelastic flutter and it's the same principle that caused the Tacoma Narrows Bridge to collapse. Prototypes have generated 40 milliwatts in 10-mph wind, making the windbelt 10 to 30 times as efficient as the best microturbines.

Shawn Frayne talks about the windbelt

Firefox has a handy feature which can check your spelling as you type in forms. To enable this go to Tools > Options > Advanced > Browsing and check 'Check spelling as I type'. If this still isn't working you may need to install your dictionary (even if your dictionary is listed under Tools > Options > Content > Languages). To do this, go to https://addons.mozilla.org/en-US/firefox/browse/type:3 and download your language, install and restart Firefox. You should now have many squiggly red lines in your forms as you type (ok, maybe that's just me :o) ).

Spotify is an online music service which allows you, much like Last.fm, to stream music to your computer via a downloadable app.

You can play individual tracks or build, share and collaborate on playlists. The free version allows you to listen to unlimited music with the occasional ad. They come up about once every 4 or 5 tracks so it's not too intrusive. You can also buy a day pass for 99p which gives you an ad free service for the day or sign up for a premium account and get unlimited ad free listening for £9.99 a month.

So far I'm very impressed with the service. It has almost everything I want to listen to and the best bit for me is that you can build custom playlists and share them with people or collaborate and build them together.

I came across a strange problem with Outlook Calendar recently where every appointment which was added to the Calendar and then edited suddenly repeated forever! A scary concept! It seemed to be related to a piece of software called 'OutlookAddinSetup'. From what I've read (http://www.eggheadcafe.com/software/aspnet/29012397/re-recurring-calenda...), this seems to be something which comes installed with Dell computers. After I uninstalled this program (from Control Panel, Programs, Uninstall a program) the problem has stopped and events only occur once. If anyone knows what the program is supposed to do please drop a comment below :)

I went to the Live Diggnation at the end of the Future of Web Apps Expo. Excellent show - I really hope they come back again next year! :) (video below)