French site Enfin.com has recently done an interwiev with Tim Mayer from FAST. A few interesting tid-bits:
Alltheweb uses many on-page (title, body text etc.) and off-page (links, anchor text etc.) features to rank web content. FAST does not use the meta keyword tag.
We consider spam to be pages that deliberately trick the search engine into offering inappropriate, redundant, or poor-quality search results. There is no specific technique that we consider spam. spam is more about how and to what extent a specific technique is used. There are specific techniques that can be used appropriately but are used to spam in the majority of cases. Cloaking would be one of these techniques