I have received offers from companies who have found my contact info through the SMA (and I've heard for a few PMs that they prefer to hire through the SMA rather than ARTsearch). But they can't see my resume on the SMA site, just my profile. I'm working to spread the word about the resume browser here on SMNetwork - so post yours and keep it updated. It's a marvelous resource for fellow SMs, students, and hirers alike!
My two cents on websites: I enjoy seeing a professional self-promo site. It just appears to me that the owner is a modern, tech-savvy SM willing to take the time to get themselves out there on the web. However, this effect is destroyed if the site welcomes anything that isn't professional - anything at all about personal life (family, pets, cute pics or animated icons (ick!), etc), especially a blog about what you ate last night and your current crush. I would recommend having two sites if you want to have a page or family and friends to check-in about your life, and another with your resume and professional materials. They can link to each other, but should remain separate portals. [I don't have a website, btw. I am not particularly computer savvy (just savvy enough!) and haven't needed such a resource in my career as yet.]