Here is what I have left. I DO keep talk, but remove gmail and maps (I have gmail in data/app)
# ls /system/app
AccountAndSyncSettings.apk
ApplicationsProvider.apk
Bluetooth.apk
Browser.apk
Calendar.apk
CalendarProvider.apk
Camera.apk
CertInstaller.apk
CMParts.apk
Contacts.apk
ContactsProvider.apk
DefaultContainerService.apk
DownloadProvider.apk
DownloadProviderUi.apk
DrmProvider.apk
Gallery3D.apk
GoogleBackupTransport.apk
GoogleCalendarSyncAdapter.apk
GoogleContactsSyncAdapter.apk
GoogleFeedback.apk
GooglePartnerSetup.apk
GoogleServicesFramework.apk
kickback.apk
MediaProvider.apk
MediaUploader.apk
Mms.apk
NetworkLocation.apk
OneTimeInitializer.apk
PackageInstaller.apk
Phone.apk
PicoTts.apk
QuickSearchBox.apk
Settings.apk
SettingsProvider.apk
SetupWizard.apk
soundback.apk
SoundRecorder.apk
Superuser.apk
SystemUI.apk
Talk.apk
talkback.apk
TelephonyProvider.apk
ThemeChooser.apk
ThemeManager.apk
TtsService.apk
UserDictionaryProvider.apk
Vending.apk
villainsetup.apk
VoiceSearch.apk
I couldnt recommend cutting it down any more.