In reply to Jackwd:
It certainly can't hurt.
Sponsoring anyone is putting your brand onto an individual. If that individual is talented, wall mannered and attractive then that's surely a great combination (although I can see why certain brands would prefer headline grabbing maniacs too!)
Mina Leslie-Wujastyk is a good example. She's very pretty, comes across well, is at the top of her game - so as a female representative for a climbing brand, that's a pretty good package!
Not suggesting that ugly people aren't as good reps for a brand, but it's certainly a bonus when you have to plaster their face across all your promotional material!