We need a URL we can use in support and discussions with customers for:

• raising a support request in the correct support project
• raising a bug/improvement request in the correct jac project

If the user is logged in, it should take them to the Create Issue screen with the correct project and issue type selected. If the user isn't logged in, there would be a introductory landing page describing how to create an account and create an issue (since that's what they're trying to do).

For the URLs, I'd suggest something like:

http://jira.atlassian.com/create/CONF

Where the parameter of the URL is the project key. It would be a bonus to include the issue type in the URL (a la quick search):

http://jira.atlassian.com/create/CONF/bug
http://jira.atlassian.com/create/CONF/improvement

Although it's punctuation soup to a user who doesn't understand URLs (and therefore not as pretty), a query parameter might make an easier implementation:

http://jira.atlassian.com/create?CONF+bug