it's just a headphone jack in the glove box (on the facelift anyway) there's a charger point inside the centre console. I bought a iPod in charger off eBay for a couple of quid.
http://cgi.ebay.co.uk/IN-CAR-CHARGER-FOR-I...a#ht_1703wt_939
http://cgi.ebay.co.uk/IN-CAR-CHARGER-FOR-I...a#ht_1703wt_939