Searching for avatar on multiple Sims

I am trying to make a board that contacts helpers for new people who arrive at our SIM(s). There are a total of 8 SIMS, all within the same region. We had a system that was using the llKey2Name, but after some testing, it doesn't seem to be very reliable. The board should show if the helper is online in one of the 8 SIMS (region), but offline if they leave the 8 SIMS (region). I walked all the SIMS and sometimes it showed me online, and somtimes offline. I gave it some time to account for any lag.

Is there a better method to use than llKey2Name? The board is linked with pictures of all the helpers, each helper's prim containing a notecard with their avatar key. When a person touches the board, the program then goes through all the linked helper boards and sends a message to the ones who are "online.

Any tips to lead me in the right direction would be appreciated.

Dmitriy

Using llGetObjectDetails might be a good solution, if you internally keep track of who has been where. The only problem is it can report that an AV that has moved to another sim as being on the border of a sim for approximately 45 seconds... but if you're tracking previous locations, and you see someone on the border for a few seconds, and another scanner has picked them up, then you should be able to separate that signal from the noise.

The hard part will be fast, reliable, cross-sim IPC, in fact I'm working on that problem as well.