That is not a bad offer and looks like a valuable service. For the amount of effort to learn this I'd say it is well worth it. But I am planning something where I'll need to also monitor bitmessage and probably namecoin too. So I'll get some extra mileage out of the learning curve investment.
For bitmessage I'll want to monitor the addresses, parse the data for certain tags, and then save the contents to a data base.
I'm not sure exactly how or if I'll do similar with name coin but it would be along the lines of using it to grant entry/license type privileges.
Well armoryd is very alpha and I would not recommend it being put in a production. So I would recommend for bitcoin, is to just use bitcoind with txindex=1 and just checking each block and transaction for the addresses you are looking for this will require some strong CPU and ram, but only way I can think of doing it.
This should work for namecoin as well.