Cookieless sessions are great, but as the URL is modified with a unique code to allow the server to identify the session, search engines will not index a site using this feature as the URL effectively changes every time it visits.
Does any one know how cookieless sessions can be turned on only when required for a sesison- for example once someone has added something to a shopping basket, a session variable will be required to keep track of what is in the basket, but up until this stage, I don't want to use cookies. If you set cookieless to true in the web.config file then the URL is immediately modified regardless of the fact that no cookies are initially required.