What\'s the best way to implement an Android Market-like tabbar (Apps/Games/Downloads)?
As Cristian said, it's definitely possible using a TabHost, and you don't even need to use the androidtabs code that he links to. As of SDK level 4 (i.e. Android 1.6) you can pass a View to TabHost.TabSpec.setIndicator(), which will allow you to completely control the look of the tabs.
However, tapping either of those buttons in the Market opens up a new Activity, and as such, using simple Buttons might more closely reflect that behaviour than a TabHost would.
In the event that you need to support 1.5 as well, you could check out the zip archive from this post. It contains TabHost etc. from Android 1.6. Copying this into your project should work, even on Android 1.5. You'll then have setIndicator(View v) available to you.