I'm not sure about storing the snapshot, but regarding getting the label, snapshots are IBaselineSet objects.

First thing is to create a handle based on the UUID:
<pre>IBaselineSetHandle handle = IBaselineSet.ITEM_TYPE.createItemHandle(uuid, null);</pre>

On the client side you can use the item manager to fetch the full item:
<pre>IBaselineSet set = (IBaselineSet)workspaceConnection.teamRepository().itemManager().fetchCompleteItem(handle, IItemManager.DEFAULT, null);
set.getName()</pre>

On the server use the RepositoryItemService
<pre>
IRepositoryItemService service = OsgiServicesManager.INSTANCE.getService(IRepositoryItemService.class, null);
IBaselineSet snapshot = (IBaselineSet) service.fetchItem(handle, IRepositoryItemService.COMPLETE);
</pre>

From the command line, the only thing I can see to do is to list the snapshots and grep for the UUID.  When using the command line you can use <tt>--show-uuid y</tt> (and perhaps also <tt>--show-alias n</tt>) to see the UUIDs.
<pre>
> ./lscm list workspaces -r ella -c aniefer
(1109) "Andrew - Android Stream Workspace" Andrew Niefer
(1110) "Andrew Development Workspace" Andrew Niefer
(1111) "aniefer Workspace" Andrew Niefer
(1112) "aniefer Workspace2" Andrew Niefer

> ./lscm --show-uuid y list snapshots -r ella --maximum 50 1109 | grep _ejqpMLWIEeGOwYY0KAk2eg
(1115:_ejqpMLWIEeGOwYY0KAk2eg) "Test Snapshot 1" Jun 13, 2012 2:49 PM

</pre>

The Eclipse client avoids exposing UUIDs to the user. If you're trying to find that snapshot from the build, it is a snapshot of the build workspace so it will be stored there.

For the zip, snapshots cannot be exported as zip files. You'll have to create a workspace, load the content, and zip it up.

You might want to look into automating this in the build process. Then every build you do will have a zip of what it used.