i agree - i'd introduce as many new things as possible, to test the waters and see what he enjoys. Have you tried mushy Weetabix in whole milk? My ds cries when he's finished his weetabix (he eats a whole one - only 10 months!)
Also, my ds seems to enjoy veg more than fruit. He loves pureed sweetcorn - VERY sweet. And adding grated cheese would make him eat pretty much anything! (stir it through the warm food, so it melts, until he's eating lumpier food.)
Yoghurts are good too - most babies love them. Or flavoured fromage frais. Beware though - some of them, including the Petit Filous ones, which are aimed at children, have a lot of sugar in them...