I'm trying to use YQL to access my Twitter feed. I had it working, but when I tried my webpage on another computer instead of returning data it returned an HTML page asking me to log in. I can't expect aqll my users to do that! How do I get YQL working?

There doesn't seem to be a need for an App ID – but it requires a crumb? Search results return almost nothing on what a crumb is, nor is it listed in the docs. But unless I rip the crumb out of the query on the YQL console and insert that in my code I can't get it to work.

To Sum:
Why is it asking me to log in?
What's with the crumb?

If you're accessing the "public" endpoint you do not need any auth/login. The URL would look something like

http://query.yahooapis.com/v1/public/yql?q=select....... &format=xml

The crumb is only necessary for the console versioned endpoints for displaying the YQL console. (its reserved for console and you wouldnt need it per say)
If you still have the problem can be pass me the url you're trying to access

-- Nagesh