As you've noted, there's LJ, but some people (Trojie comes to mind)have been using Dreamwidth, which is like LJ. There's also the option of using Freewebs or a similar free web site hosting service. Really, it's up to you, so long as it's accessible to everyone else. Also, whatever's easiest for you to use. LJ and Dreamwidth are free to sign up for, and they have the added bonus of allowing other people to comment on the entries, whereas a webpage might not have that option.