A substantial corpus of American Sign Language (ASL) video data from native signers is being collected and made available. Data collection began in December 1999. The video data are being made available in both uncompressed and compressed formats. Significant portions of the collected data are also being linguistically annotated using SignStream®. The SignStream® databases are made publicly available, as will the SignStream application itself. (Although SignStream® is a MacOS Classic application, the data can be exported in text format, for use on other platforms. A new Java reimplementation is currently under development.) The video data are also being analyzed by various computer algorithms. The SignStream® annotations of the data provide "ground truth" for evaluating such algorithms. The collected data and the analysis results are being distributed over the Internet and on CD-ROM. Thus, this project makes available sophisticated facilities for data collection, a standardization of protocol for such collection, and large amounts of language data.