I just published an updated version of the Seam Hotdeploy Maven Plugin (see my previous post here). For a detailed description on how to use it, have a look at the Google Code Wiki. I also updated the sample Maven POM featuring JBoss Seam 2.1.1.GA.
The new version should be easier to configure and play nicer with e.g. the Eclipse Maven plugin (I'm not using NetBeans/IntelliJ too often, but I hope this works also fine there). The new Eclipse builder configuration looks like shown in the image below:
Note: The Eclipse Maven plugin using its embedded Maven had somehow problems with the extended lifecycle of the Hotdeploy Plugin. Using an external Maven installation (2.0.10) felt not only faster but was also not having problems with it.