CTAN has a new package: threeparttablex

[CTAN Announcements]

This package should be at your local mirror by this time tomorrow.

Jim Hefferon
Saint Michael's College

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The following information was provided by our fellow contributor:

Name of contribution: threeparttablex
Version number: v0.03
Author's name: Lars Madsen
Location on CTAN: /macros/latex/contrib/threeparttablex
Summary description: This package brings table notes to longtable
License type: lppl

Announcement text: 
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I a book design that use threeparttable for adding
tablenotes to regular tables, it looks odd to use footnotes
to add notes to a longtable. 

This package extends threeparttable bringing it to longtable
(although with a different interface). If asked for it can
also make tablenotes referable.

See the doc for more information and examples.
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This package is located at 
   http://tug.ctan.org/tex-archive/macros/latex/contrib/threeparttablex
.  More information is at
   http://tug.ctan.org/pkg/threeparttablex
(if the package is new it may take a day for that information to 
appear).  We are supported by the TeX Users Group http://www.tug.org .  
Please join a users group; see http://www.tug.org/usergroups.html .