Yahoo! Finance now offers
RSS feeds for the latest news on invididual company stocks. In fact, you can get feeds both for individual stock tickers as well as for a whole "portfolio".
Here is an example how to track news for both PalmSource and palmOne in one feed:
http://finance.yahoo.com/rss/headline?s=plmo,psrc
If you are new to RSS, jump to
this description for all the basics.
(Btw, I am Member of the Day on MR's frontpage today! I think this is my first time, so I feel honored
)