The TeleNav app filename is as follows:
Edit: I believe this is the correct filename.
I found it here.
To access the apps directory britbloke is referring to above, type "ls system/app" while in the adb shell.
I haven't been able to remove it myself, but only because I'm being told it's read-only, regardless of the number of times I restart my computer/phone or enable root permissions via the secret menu.
I also sort of regret removing Rings Extended. I was blindly following the guide and not thinking about what I was going, but with it gone I don't think I'm able to customize ringtones anymore. I found it in the Marketplace but I can't seem to reinstall it due to an "Incompatible update", which I suspect means I need to find an older version of it to use.
As for the v10f firmware update, it does indeed fix the space bar issue but I don't think there's a difference in the sensitivity of the home/return panels. =\
The link on LG's site is down, but if you really want it I've uploaded it here
. It's pretty intuitive; if you can root your phone then updating shouldn''t be a problem.