Yet another new-to-me Android 2.1 feature: tap and hold the dots on the bottom right and/or left of your home screen to see thumbnail previews of ALL the phone's screens. Tap on a thumbnail to switch to that screen, no swipe necessary.
As you can see in the screenshot, the thumbnail previews don't include wallpaper—the background is just white, for better visibility—but they do show the icon and widget layout so you can identify which screen's which. This type of screen-switching will be familiar to virtual desktop lovers, or folks who use Spaces on OS X.
Android continues to live up to its reputation as "OS by Easter Egg," Jeff Jarvis' description . If you don't want to have to hunt down every egg yourself, here's Android 2.1's best features in screenshots.
Switch Android Home Screens via Thumbnails [Smarterware]