Listed below I have tried to give a summary of the best resources, in my humble opinion, that are available at the moment to get started with IBM XPages on Bluemix. Included are the official documentation, recommended blog post and videos that will help you to use IBM XPages on Bluemix the best possible way. I have also included my own blog post. Perhaps these also contribute a little bit.
If you have additions than please let me know and I'll add it to the overview below.
A. IBM XPages for Bluemix documentation
Building apps with the IBM XPages for Bluemix runtime
Getting started with IBM XPages NoSQL Database for Bluemix
Creating apps with the IBM XPages Web Starter
B. Recommended blog posts
Hybrid XPages Applications on Bluemix via Brian Gleeson
Using Plugins in your XPages Application on Bluemix via Oliver Busse
My first Bluemix XPages application via Oliver Busse
Combine the XPages NoSQL Service and Node.js Runtime via Brian Gleeson
Using IBM Domino Designer for XPages on Bluemix via Brian Gleeson
Getting started with XPages on Bluemix via Brian Gleeson
Creating my first true XPages in Bluemix application via Mark Roden
XPages in Bluemix – where is the design and where is the data? via Mark Roden
XPages in Bluemix – Looking at the application dashboard via Mark Roden
XPages in Bluemix – Pushing new changes via Bluemix git repository via Mark Roden
Bluemix Monitoring and Analytics – free service via Mark Roden
XPages on Bluemix a first look deploying app via Fredrik Norling
How to add your custom domain to your Bluemix app via Fredrik Norling
Building On Premises XPages The Bluemix Way via Paul Withers
XPages on Bluemix - finally we got here via Oliver Busse
Announcing IBM XPages on Bluemix via Brian Gleeson
XPages Comes to Bluemix via Eric McCormick
Usage of Cloudant NoSQL Databases in XPages Applications via Niklas Heidloff
C. My own contributions
IBM XPages on Bluemix: XPages NoSQL Database Part II - Connecting to the XPages NoSQL Database service from Domino Designer (1)
IBM XPages on Bluemix: XPages NoSQL Database Part I - Create an XPages NoSQL Database service instance
IBM XPages on Bluemix: Slides from the Webcast An Introduction to Creating Domino Applications in the Bluemix Environment
IBM XPages on Bluemix: Timeout message while deploying changes to the Bluemix environment using Domino Designer
IBM XPages on Bluemix: Deploy changes to the Bluemix environment via Cloud Foundry Command Line Interface
IBM XPages on Bluemix: Deploy changes to the Bluemix environment via Domino Designer Part II
IBM XPages on Bluemix: Deploy changes to the Bluemix environment via Domino Designer
Customizing the XPages Web Starter Application on Bluemix - Start Coding
Creating XPages Applications with the IBM XPages Web Starter on Bluemix
IBM XPages goes Bluemix (Experimental) - New XPages Extension Library has been released
D. IBM developerWorks
IBM developerWorks - Questions tagged with "xpages-runtime"
IBM developerWorks - Questions tagged with "xpages-service"
E. VideosSome very good videos about IBM XPages on Bluemix.
Making Hybrid XPages Applications on Bluemix
This video describes how to create hybrid XPages applications in Bluemix. A hybrid application is defined in this context as a Bluemix cloud application that has its data hosted on an external private server. This video shows you how to configure an XPages Bluemix application to connect with a data NSF on an external Domino server. In the latest XPages runtime update, support was added for such hybrid applications, providing a powerful secure use case for XPages apps in Bluemix.
NotesIn9 184: XPages and Bluemix Part 1
NotesIn9 185: XPages and IBM Bluemix Part 2
NotesIn9 186: XPages and IBM Bluemix Part 3
Combine the XPages NoSQL Service and Node.js Runtime
IBM XPages on Bluemix - Integrated Tooling in IBM Domino Designer
IBM XPages Database Service on Bluemix - Connecting with IBM Domino Designer
Getting started with XPages on Bluemix
XPages on Bluemix - What are you waiting for?