If you're familiar with Basecamp or Backpack (both from 37signals), you know that when you sign up you're given a special URL to login to your account. It's usually something like "username.backpackit.com."

Let's say that you haven't used Backpack in a while and you go the homepage and find the login link (which is tiny and easily missed) but when you go to the Backpack login page, instead of a login form, you're given instructions about your login URL.

Personally, I've never liked this system. I don't use Basecamp or Backpack very often and always forget to bookmark my login URL and am always frustrated when I can't login from the login page.

Tonight I was trying out StikiPad and found that they give users a login url, but they also allow you to login right from their homepage.

I'm a big fan of 37signals, but on this point I think StikiPad does it better.

I've been using a wiki to do some documentation recently and I suddenly noticed that the search form has two buttons: "Go" and "Search." After a some experimenting, I realized that pressing the "Go" button takes you directly to a page named whatever you typed into the text input (/wiki/test) and pressing the "Search" button searches the wiki for that term. Even if the buttons serve two discreet functions, you have to admit this is hardly intuitive.