Update README.md

README.md

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 For the latest information, details on how to contrib and branching, and other information, see: https://github.com/greese/dasein-cloud/wiki
 
+For online collaboration and questions, join the HipChat at: https://www.hipchat.com/gLjcZbGFl
+
 For discussion, join the Dasein Cloud Google Groups group: https://groups.google.com/forum/#!forum/dasein-cloud
 
 Dasein Cloud (pronounced "da z-eye-n") is a Java-based cloud abstraction layer that enables 
@@ -36,4 +38,4 @@ as the fact that launching a VM is never immediate).
 dasein-cloud-cli is a command-line library for talking to clouds.
 
 dasein-cloud-skeleton is a skeleton implementation that can be useful when starting out writing your own
-Dasein Cloud implementation for a new cloud.
+Dasein Cloud implementation for a new cloud.