There's no real magic involved, so whatever you go with for the needs you described in the first post is going to be just as good as the next one. The lists of names that will drop each day is almost always the same so Droplist1.com is going to have the same list Droplist2.com has. The differences will be what they do with the names in the list. That is, which additional metrics are provided at a glance or upon additional research. The task of simply sending a daily mail with the list of names that will drop the next day containing a keyword is simple. You could even do this yourself, as I explained earlier.
If you want to pay for it, and you need one of those infomercial type pages to convince you it's better quality, then you might like
http://www.justdropped.com/cbkeywordservice.html