GnuPG, in its various guises, can be downloaded from GnuPG.org.
My public key, as of 13th April, 2012, is:
-----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v2.0.12 (MingW32) mQGiBEjT0w4RBADoynrVPMeBY0HQhG3eodjr25QQUgccPGnR5KZBn7A5iFvlox6w xFmMesS8Jw1Qiw4M/0yXvZhBBiaRGWlYsIIq2wxaausQ2iVrXusbEy+gAqcFLPXP cVBUlZZ3+udVQZ598ZONZQd1Pc6dfNuwEIg5jvap9I2oyfjPubILaRzpgwCgprb9 x/+AnAKlkQGVvplpovp/0TsEAMQq6N5BPROTnjnE2oHN5b/nBSxKdWRg9jqJAbjW OCHl3RkXtH3ZZ0z92lthQVHHuB9Boz+F5h+jhPOi/bql15o5kiiNWqcdz1Hd5yu3 w4QHcssmgZFRX/onjBjW6XJop4V6pQ32imw/XqFLm6Js6Ro2OOsCGGco+SKTzXzS /l32BADlrudsZB6SgzfjsOpOBilj8IMEFfCKt0MFMu/h9OELrD8sEnV1n9rv3xq2 ql1OY4kOdISafqRqUy0EQFWwFf/h74BsQndAfr3IUygNSmB7ASP/ahxk0clkv9Mh jXiwEhlwu0u45x3MqVMPnCvZm/2Uw5RUoxhLqhfKRxBQ5X51lbQnQ2hyaXN0b3Bo ZXIgSGFycmlzb24gKFhvcGgpIDxjQHhvcGguY28+iGUEExEIACUCGwMGCwkIBwMC BhUIAgkKCwQWAgMBAh4BAheABQJOk07lAhkBAAoJELnA1bkseOUt6zEAn1l0qH58 JBMSCp/7M/+iC2zdV9IUAJ4rZULSNw5yJOL13zisSlzWqwSm57RBQ2hyaXN0b3Bo ZXIgSGFycmlzb24gKE1BIExpbmd1aXN0aWNzIDIwMDkvMTApIDx1Y2p0Y2hoQHVj bC5hYy51az6IWAQwEQgAGAUCT4huZBEdIEFkZHJlc3MgZXhwaXJlZAAKCRC5wNW5 LHjlLbvDAJ9dtlBzMQH5jTvAvHYTXmXyLb1HsQCgoxuvdtM5tiOXyEmdMPhAFZ4e MBS0O0NocmlzdG9waGVyIEhhcnJpc29uIChYb2NvbGF0bCkgPENocmlzQENpb2Nj b2xhdGVyaWEuY28udWs+iGYEMBEIACYFAk6olKAfHSBjaW9jY29sYXRlcmlhLmNv LnVrIGNhbmNlbGxlZAAKCRC5wNW5LHjlLdUPAJwIyE7hT92RpWPPtKGWi16F6whe qACfVvgNj2vYkwXKEA84Yemy0e1c3Q65Ag0ESNPTDhAIAJ+u0y8Z59sQKRrvk0aK +gv0tMLuTZ4IWlmAhDdbnb9Q6JTo1N6ZjjBgutLLrJwfQjoClrLxpuF4VszX3lll eQWE/T7f0SYDGxAThxRGUv4t4WfCbJI8TIRUt/EA/5PhBYuCrajq8IWqvXK6ZavN 0zbIu2bg3G0mQicEegOUoiDQurVwnvRjLDZP3dueAbuULQV8jhtHah3N16M6xvkf uhYwJyhjQX0YQGuuuc4+JSsM7Gnhh7HfHTbEt45iZvObWf30hTjcym50Or6efh9o 2vC+NQIkRo3jVCsQpXxBAppoAPq7ITBDblh/wsOpXKqZj008dhtyqzEXU4CARQwa v/8AAwUH/ivKH44M13J6QE9NS6JXTHxAJzq3OZxvqRCkE1QmqbTV71sBj4QGTNJ4 wYa56gZuy4NGd2z6s1S5SveX84J5ohbqhIEnQNUPWOabmOEM6ua1K96qmixFo1wg 7LcPnNNGE6w/Iakg3GwEytfe4r029eE5JIW9xlz1ZX5toLJRVdCdhi2sxuepUm1E rY7FUl9X4vDPiDlL691v6mjUCw2MdE/rmSAVoZVe2XVlt0+m1svLM1p4iC/GbWya lpbR22FZ+94cX1LMRRDtjUHCGbMimqBXmbh4E7cI4j0ne4Fo1i5lvI0ddc+ZjStf lXphTg8tKb5BEmxAHjTE2/5dNsho4vyISQQYEQIACQUCSNPTDgIbDAAKCRC5wNW5 LHjlLW2/AKCa6m6V633K+ha+Z6OiaWMNecPR3ACfeS6Be/0EybtSMqn2GcTrVo1P CTw= =8ofQ -----END PGP PUBLIC KEY BLOCK-----