Via Search Engine Watch Forums, an interview in French, of Danica Brinton of Ask.com's Blog Search product. There is a PDF document of the English translation that you can download here.
Key Points not already covered at Ask.com Launches Blog & Feed Search include:
- Ask.com Blog Search uses the Bloglines Subscription Data
- More subscriptions the more quality the site
- Most robust blog index with 1.5 billion documents indexed, and 4-6 million added per day
- Search Filters
- Binoculars views
Forum discussion at Search Engine Watch Forums.