Invision Power Board 2.3
Invision Power Converge (IP.Converge)
I am willing to pay for this to be done.
IP.Converge Plugin that will connect to wordpress-mu as a Plugin (they have a Plugin's as well) syncing the user databases together. From what I've seen on the talk about people wanting this for Word Press, it is something that could be implemented for IP. I believe by doing as a Plugin to Converge it will allow better and easier integration between IP.Board as well as other IP products.
With the way wordpress handles plugins and the way that Invision Power (IP) will start to handle integration these two software could be integrated fairly well with someone who is knowledgeable in php.
IP Converge is no longer in beta and is in stable release. By creating a plugin with IP.Converge and wordpress, this should be possible to make an integration that won't be effected when IPB or wordpress upgrades and doesn't require some sort of major hacking after every update. This is essentially what IP.Converge is designed to do as well integrate member databases between IP products and others.
The proposed method to make this work with Word Press, it was suggested that after installing wordpress, we should copy over the converge_local folder into the wordpress root directory. I would also assume we would need to modify wordpress login process to be modified to send a XMLRPC request to converge. To find an example we can look at sources/loginauth/converge/auth.php in IPB (I can provide the files if needed).
If someone is interested in looking at it, I can supply the converge_local folder which would need to be modified to work with wordpress. WordPress login process would need to be modified to send an XMLRPC request to Converge in the proper format. You can look in sources/loginauth/converge/auth.php in IPB for an example of how IPB does it. (I can provide file)
Documentation on the Converge XML-RPC process is here.