We've migrated the technology in Tailank and made it available in Spinn3r.
In the mean time check out our blog post explaining the miration.
A number of people (including our customers) have asked me about Tailrank and what we're doing with the product.We're shutting down the consumer facing website because the architecture was difficult (and expensive) to maintain alongside Spinn3r 3.0. We're going to be selling off the assets and integrating the technology into a future version of Spinn3r.
If you're interested in purchasing the assets to Tailrank feel free to send me a private email or just contact us directly.
At this point Tailrank is not a market in which we want to focus. The space is too fragmented, has too much competition, and very little room for innovation.
The clustering and ranking technology present in Tailrank 3.0 (which never shipped) will be refactored and integrated in the Spinn3r 3.1 or 3.2 timeframe (2-6 months).
If you'd like an alternative I'd recommend Reddit, Digg, Techmeme, Newsvine, Google News, or Wikio. They're all good products with a significant amount of attention and traction.
At some point we might integrate memetracking directly into the Spinn3r corpus but at the moment our customers have a number of pending requests that we plan on servicing first.