Mesh/Uploading and wearing a rigged mesh

Rigged meshes allow you to represent your avatar skeleton as a mesh that conforms to your joints and motions. This means that you can wear a rigged model that changes the length and orientation of your avatar's limbs and animates accordingly. This tutorial explains the process of uploading and wearing a basic rigged mesh.
== Creating a rigged avatar ==
Tutorials
* Creating a full avatar in Maya and rigging in Blender (video tutorial)
* Making mesh clothes in Blender (video tutorial series)
* How to rig a mesh in Maya (video tutorial)
== Get a Second Life compatible rigged mesh file ==
The first step is to get a mesh file that you want to upload to Second Life. Second Life's mesh import is able to read COLLADA (".dae") files. You will need to use one that has joint rigging information:
# Download the zip file containing the simplebot.dae COLLADA file: 
#: Blender 2.49: BROKEN LINK: http://download.cloud.secondlife.com/project-viewers/mesh/examples/simplebot.zip
#: Blender 2.49 Alternative: http://streaming.the-machinimatrix.com/pub/tutorials/meshes_1/avatar.blend
#: Blender 2.6: http://coadey.com/simplebot_blender26.zip
# Extract and save the simplebot.dae file anywhere on your hard drive where you can find it later.
== Upload the mesh file to Second Life ==
To upload the mesh file to Second Life:
# Select Build > Upload > Model....
#: Alternatively, open My Inventory, click the + button, and select Upload > Model....
#: A file dialog box opens.
# Find and select the simplebot.dae file from your computer.
#: The Upload Model window appears.
# Enter a name for your model in the Name field.
# Select the Skin Weights checkbox.
#: The viewer takes a few seconds to process this.
# Select the Joint Positions checkbox.
#: Note: Attaching a rigged mesh with joint positions will override your avatar skeleton joint positions, and may make your arms/legs/back/neck longer/shorter, eyes pop out, etc.
#: You can use the mouse to zoom in on the preview window or rotate the mesh.
# Click the Upload button.
#: Two new assets appear in your inventory: one in the Meshes folder, the other in the Objects folder.
#: For the simplebot object, these new assets are named Simple_Bot_001.
#: Note: For this tutorial, we only care about the asset in your Object folder.
== Wear your rigged mesh ==
To wear the rigged mesh you imported:
# In My Inventory, open the Current Outfit folder and detach any attachments that you don't want to be part of your final appearance. 
# Right-click the new mesh object Simple_Bot_001 in your Objects folder and select Wear.
#: This attaches the mesh object to your right hand or some other arbitrary location; the location is not important.
# In My Inventory, open the Library > Body Parts > Alpha Masks folder.
# Right-click the Invisible Avatar item and select Wear.
#: Your avatar appears as a thin white robot.
# Walk or animate your avatar. The white mesh moves just as your avatar does.
To remove the mesh, detach it like any other attachment:
# In My Inventory, find Simple_Bot_001 in the Objects folder or Current Look folder, right-click it, and select Detach From Yourself.
# In your Current Look folder, right-click Invisible Avatar and select Take Off.
Continue on to Decomposing a mesh for physics shape.