- how long are you going to be in the Cape?
- are you looking to stay in Cape Town itself, or to travel to other Cape climbing destinations (e.g. Cedarberg, Montagu)
- what kind of accommodation are you looking for? CT has everything from camping to 6-star hotels
Nic's suggestion of CityRock is a good one. It's an active gym - you should be able get info, contacts, and possibly climbing partners. I suggest you swing by there on one of your first evenings in town.
If guiding is your thing, consider http://montaguclimbing.com
, VentureForth and HighAdventure. I've never used them, but both employ highly capable staff. (Disclaimer: I have no personal interest in either company).
PS - I used to know a Phynancier called LondonPete. Any relation?