I tried a number of times to get the latest Google Maps update (4.4) and failed each time. Then I went back to something that was posted here and on My Droid Life when people were having the same issue with updating to 4.3. It works like a charm - first time.....
Open terminal emulator and type the following. At the end of each line push enter.
mount -o remount,rw -t yaffs2 dev/block/mtdblock4 system
busybox rm system/app/Maps.apk
sh pm uninstall com.google.android.apps.maps
mount -o ro,remount -t yaffs2 dev/block/mtdblock4 system
That's it. The only thing I would add (just to be proper) would be to type:
Then reboot, log in to maps and enjoy.