Quick note to self in case I (inevitably) forget later. If you are using Apache mod_rewrite to make nice, clean URLs, and are also supporting JSONP, you may run into the situation where you have code that wants to append "?callback=xxx" to your URL (e.g., a cross-domain AJAX call in jQuery). Imagine you have a nice clean URL /user/123, which actually corresponds to user.php?id=123.

Quick note to say how much I like the programmers' Q & A site Stack Overflow. I've only asked two questions, but the responses have been rapid and useful. I found out about Stack Overflow by listening to the Stack Overflow podcast episodes on IT Conversations (which carry a lot of other podcasts as well). For a wannabe geek, these podcasts are a great source of ideas.