Nice little site, giving details of all of the attractions, along with accommodation availability. Go to Top Hostels YHA - Listings of youth hostels nationwide. Contact details for hostels around the country, and email booking available. Offers and news of trip to Africa. London Hostels - Limited number of hostels listed.
Prices are very cheap, but the info is poor, and the nature of the accommodation is dorms.
Good photos and prices, with contact details, or use the online booking form. Databrowse - Excellent details of each establishment. No photos, but the details are good enough. Prices and contact details. Expensive end of market.