Chili, I got a sponsohouse membership and I have to say no dice on it.
Why?
Well I was STOKED at first, I had sponsorship's from LARGE companies. But at the best they were offering 30 percent off, which isn't bad, but it's peanuts considering the fact that they are making direct sales to us, no middle man. Some only offer 15-20 percent off. Basically once you factor in the shipping that they charge plus the customs (there is no way to avoid the fees because they are all registered companies)
So what have I learned? It is a good tool to meet or at least talk to some head honcho's of company's but that's about it.
I used my works connection sponsorship just because they can offer me 03 stuff right now and my dealer can't.
Your best bet is to make a good solid resume, make a cover letter specifically for EACH company and tell them why you like their products and what you plan on doing for them.
I have written quite a few in my day and still follow the sponsorhouse format, if you would like send me a copy and ill give you my opinion and send you the format I use.
Aaron
ps. In all honesty sponsorhouse is a decent tool, but mainly it just makes you buy more products than you orginally would have without the sponsorship.