Today I spent the morning at the Jerez Circuito de Velocidad (normally used for the Motorbike Grand Prix) watching Lewis Hamilton testing the new MP4-24 F1 car for the 2009 season.
If you are interested in going the next time teams will be practicing at Jerez will be 1 - 4 March. It's 5 Euros to get in and a Euro to park. Not bad for a nice day out in the sun...!
More details can be found at the Mclaren website below:
http://www.mclaren.com/f1season/jerez-feb09-13.php