[tweakmonkey]

Great modification! I installed it and got it working.

Initially my markers were not showing up. I followed the PDF to the step, so I viewed the source inside the compiled .php file and noticed all the missing images had the same name: mm_20_.png. In the Administration Panel -> VBGooglemapME -> ME Usergroup Marker, I had to set the Markers before anything would show up. There were no default colors loaded. This might be something to address.

I got the postbit working and now I'm making changes to it. I failed initially because I wasn't editing the legacy postbit.

I had a few suggestions / requests:
1) Show avatars by default.
2) Change the maps' tooltips. I have never played with Googlemaps API before, but I've seen a few sites that work a little better, such as this one, where it automatically could show the username when moused-over, then clicking could reveal the current menu. The reason I dislike the current tooltips is because if entries are close together, you either must click the (X) to close them or find another one far enough away to let you change the selected marker, rather than simply mousing-over to see who's who. I hope this makes sense.
3) Add a warning to the map (maybe configurable in the panel) that tells people that it could take 10 minutes to show new entries on the map. This was an easy enough hack though.
4) Have an option to show usersonline (as in the main forum listing) below the map or its key.

Thanks again for a great plugin, I'm going to play with it extensively.

Edit - realized the default zoom (when clicking the postbit option) is 10, and it's hardcoded into the XML
Edit 2 - does the color of the marker actually change if a user is offline?