We've got access to the people who run the 100,000 web sites being monitored by getclicky.com (same team). We shouldn't have a problem there.
Having access doesn't mean they'll all sign up to it. Case in point, I'm a Clicky user (and I love it), but I'm not going to be signing up to this until I see evidence that it's worth the hassle. So there's a typical chicken and egg problem there, basically.
This is pretty much as hard as making sure multiple startups launch successfully simultaneously. It would probably help if they had a VC working with them. Either way, I wish them luck.