I was wondering, is there a way to have my browser update (live) when a new question appears in the Stack Overflow feed? I've heard of RSS--does that have anything to do with this?
If you have a feed aggregation application available (e.g. Internet Explorer or Mozilla Thunderbird) you can subscribe to RSS feeds. Depending on your browser there should be a highlight icon that picks up the RSS links within each Stack Exchange site page.
Using the multi-site tag following capability of http://StackExchange.com you can create your own mix of tags and sites to follow.