Sadly, this blog (among others) has been repeatedly and aggressively attacked by spammers recently. Despite the many filters in place to prevent this many what I consider extremely rude and offensive comments have been making it through. I have asked my webmaster to (at least for now) disable comments and help me clean up the spam. It's sad that such a useful interaction tool has to be crippled due to what basically amounts to mindless on-line vandalism. I will continue to try and post items here that are of interest. In lieu of the comment facility being available , if you have feedback for me on any of my postings please send me e-mail and I promise to read it. Sorry for the inconvenience but I feel I have no choice.