I've got a draft article I was writing for my blog arguing that Arrington should resign because his conflicts of interest make his role as editor of TC untenable.

Among other reasons I was arguing that Arrington has to disclaim his investment in any article about a competing firm, however since his investment in SV Angels he's now invested in a number of firms which are in stealth mode, which means in practical terms that it's impossible for him to meet his obligations.