nice article....2 limitations to add to the list:

1) as "sbateman" mentioned, Table Variables cannot be used in SELECT ... INTO statements

2) Table Variables cannot be used in sub-processes, such as: EXEC, sp_executesql, a Trigger on a table updated by this proc or batch, or sub-Procedure calls. But Temporary Tables are just fine in these situations.

Something to note about performance: I cannot remember where I read this but it was mentioned that Table Variables, not existing as a full table like Temporary Tables do, only ever appear to the Query Optimizier to have one row in them regardless of how many rows really exist. So, as the number of rows increase, the Optimizer is more likely to choose an inappropriate (i.e. inefficient) execution plan--one that is designed for a small set of rows instead of a larger set of rows.