China Red - I should be in Beijing for a few weeks at some point in the near future. Anything you'd advise I definitely see when out there other than a rather large brick wall?

Only been to South India and have to say have enjoyed it both times. Its a bit weird first of all as there's extreme poverty alongside extreme wealth so can be a bit disorientating. Only really been in and around Bangalore (work) but have ventured out to Mysore, Mangalore and Chennai (Madras). If you're into partying then hit Goa.
Heard great things about Kashmir but that's a whole different ball game given the tension between India and Pakistan... and the frequency of bombings that largely goes unreported outside of India.
You'll also need to watch out for the monsoon season as it differs all across the country.
Actually in four years here I have only seen Beijing airport. Really need to get there sometime and have a look around because it's supposed to be really good.
Great Wall, Summer Palace, Forbidden city and Tiananmen Square are the main tourist spots but there is a lot more to do but have not seen it myself.
If you do end up going there and need a local to show you around for a couple of days then PM me because I have a few Chinese friends living there right now.