A Search Engine Watch Forums inquires on the way to get site indexed in Ask.com.
Ask.com's Webmasters page says that its crawlers go around the web from one link to another looking for significant content.
Ask utilizes Web crawlers to collect raw data and gather information that is used in building our ever-expanding search index. Crawling ensures that the information in our results is as up-to-date and relevant as it can possibly be. Our crawlers are well designed and professionally operated, providing an invaluable service that is in accordance with search industry standards.
Paid inclusion is no longer available. However, Ask.com says that they do wish to find new pages at the time of normal crawl process.
As a result of some recent enhancements to Ask, we're confident that we're indexing even more Web pages than ever, and that your site should appear in our Search index as a result of our ongoing "crawling" of the Web for new and updated sites and content.
A very old Webmaster world post says that it was possible to submit the pages to firstname.lastname@example.org or email@example.com. Not sure if that works. The simple way to get included is through popular links.