Forming an astronomers' mailing list

I have a telescope, and the weather is now such that I from time to time wish to use it. OK, it gets dark somewhat unreasonably late at the moment, so the list may get more active come the autumn; Mercury's in quite a good position this week at around sunset (say 8:30), Mars is in conjunction with Saturn on the 17th - both planets will appear in a single telescope field of view - so I'll start off by inviting interested people to my place, and thence to the top of Castle Mound, that evening at eight-ish.

[though it's Suicide Sunday the next day, so possibly everybody will be at May Balls, or Pimms- and Camwater-sodden after the CTS punting]

If any Cambridge people would like to be added to a list of people to be invited to admire the stars when my fickle fancy takes me, please comment here: