I tend to find that it is better to give the full details.Some 'link' sites may begin with something like http:// forum...etc. Forgetting the http:// usually brings 'unavailable' or 'server not found'.
For the newcomer or not so new, this can get a little confusing :o)
Hi cga, Just tried a few addresses with and without www. for the few? sites that do not need www you are told to click on the home page in the "site not found" message so you still get there and if it needs www it puts it in for you as I said so I would say for the majority of sites forget www and keep the twist out of your t>o#n~g+u<e, thspits it out;-)