An update to the IP Block IISIP is available here.
The original blog post describes the app in more detail.
The change log is below.
.80 - Initial release
.82 - Added event log IP scanner to auto extract IPs from event log
.84 - More robust checking for duplicates and properly formed data
Keep latest copy of downloaded feed data in txt file for easy inspection
Allow for comments by skipping IPFeed data lines starting with #
Misc small fixes