I seem to have found a comment form that works; thanks to everyone for their advice and suggestions. I have also used a slightly modified version of the sociable plugin to add tiny links beneath each post so that you can socially bookmark any of them via del.icio.us, digg or co.mments. Sociable supports a lot of social bookmarking services, but in the interests of keeping the icon-noise level down, I started with the three that I use. Are there other sites that are listed on the Sociable page that you use often? As always, you can track when I’m using for my WordPress install on the wordpress mods page.