The docs on both the apiwiki and dev.twitter sites say that the search API is limited to 1,500 results through the combination of the rpp and page arguments. There are no details on the time frame for this search, or whether this applies to a single query string. Since you can only get that many results through multiple calls to the search API, this limit is confusing.
Is it 1,500 results for a single q=value argument or multiple q=value arguments? Is this within a single hour, which seems to be a common time frame for rate limiting? I'll be putting the answer to this in an online tutorial and a book I'm writing, so the answer will be available beyond just this list. Thanks for any details.