Another social network wants your credit card information. In this CNET Update, learn about Twitter's new "Buy" button that folds shopping into the mobile app. Meanwhile, other services are determined to show you more video ads:
Featured in this tech-news roundup:
- to sponsor 30-minute blocks of music streaming.
- , with the aim to woo more advertisers and publishers.
- The is a mighty DVR that can record three years' worth of video.
- Send self-destructing voice messages with the .
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