Edit 2009-11-10: if you are a developer make sure to check my colored logcat tool
I have seen that it can be a pain the ass to install the Android usb drivers used for debugging, so I put here the steps I made and successfuly got the Android to debug correctly.
1. install Samsung PC Studio 3 v3.2.3 IE2 (or later) to get the normal usb drivers. My link was http://lfiles3.brothersoft.com/internet/mobile/Samsung_PC_Studio_321_GJ9.exe
2. connect the Samsung Galaxy Android device(at this time USB debugging is turned off - see #6). Mass storage has to be turned off as well - see #5. Let Windows install the new hardware - the Samsung drivers.
You can now access the SD card on your device. You will see a USB symbol in the notification bar of the phone at the top. Pull it down and you will see "USB connected. Select to copy files/from your computer". Enable it and you will have access to the SD card.
Next steps are for development only!
This works for both Android 1.5 and Android 1.6 Samsung Galaxy firmwares
3. Download the Android SDK from http://developer.android.com/intl/de/sdk/index.html and unpack it to c:\. Run SDK Setup.exe and make sure to install the 'Usb driver package'. Follow the 4 steps that are provided on that page.
4. modify c:\android-sdk-windows\android_winusb.inf
under the [Google.NTx86] and under [Google.NTamd64] entry add
; Samsung galaxy
%CompositeAdbInterface% = USB_Install, USB\VID_04E8&PID_6640&MI_00
%SingleBootLoaderInterface% = USB_Install, USB\VID_04E8&PID_6640&MI_04
Some people have reported the MI_04 combination above is not working; you may want to try MI_1 to MI_4 to be sure.
5. go to the phone -> Settings -> About Phone -> Additional Settings -> disable Mass storage only
6. go to the phone -> Settings -> Applications -> Development -> enable USB debugging
7. plug your phone to your computer - Windows will ask for a new driver - the driver that is used for debugging. Point the driver search to c:\android-sdk-windows\usb_driver\android_winusb.inf
You should now be able to use debugging on the Samsung Galaxy Android.
Tips on debugging Samsung Galaxy Android:
1. to check if you can debug on the Android, use “c:\android-sdk-windows\tools\adb.exe devices”
List of devices attached
This entry is for my Samsung Galaxy I7500 Android phone.
2. use “c:\android-sdk-windows\tools\adb.exe logcat” to see the live and past Android logs. This is probably the most used command. Also see following article for an enhanced colored logcat
3. check out the documentation to see how to install and remove applications from the Android phone: http://developer.android.com/intl/de/guide/developing/tools/adb.html
Good luck and have fun!