As usually I have learned about update from third party site, Verizon does not have any updates notification in place. Searched their site, searched Palm's release notes page and nothing. I downloaded it this morning at home while I was still on my WI-FI and in network extender range. It took more than advertised 15 minutes but update was non-problematic so far.
[caption id="attachment_732" align="aligncenter" width="200" caption="webOS 1.4.5 update"][/caption]
I do not know if GPS issues are resolved so I used GPS Fix before my morning bike commute and it seems like nothing is better than it was before.