Barry tipped me off about a couple of RSS feeds people are generating.
Since the iTunes App Store has removed lists of new applications, etc, these guys are generating the data for you.
Price Drops
148 apps gives us:
http://www.148apps.com/includes/itms_pricedrops.rss
This feed will tell you about apps whose prices have dropped.
Free Applications
Pinch Media gives us:
http://feeds.feedburner.com/RecentlyAddedFreeIphoneApplications-PinchMedia?format=xml
This feed will show you new applications that are free.
Use these feeds in Safari or the most excellent and free NetNewsWire
Funny enough, I never look at new apps on the Mac, but always on the iPhone. This is very nice however.