Skydeck makes a very cool product, but it is destined for smallness.
The product: It's a service the mobile phone carriers can use to make their Web pages actually useful for their customers. Instead of just showing a bunch of marketing pitches and the minutiae of the customer's bill, a Skydeck-powered site shows phone users who they talk to, either in chronological order or by frequency, and in an extremely comprehensible format. For users whose phones have the necessary software enabled (SyncML), it will also let them manage their phone address books.
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