First impression was that you improved the performance. It loads faster and also selecting is way faster than before. But there were also some major problems which prevent me from using it.
- The attribute "width" of the Datatable and also of the p:columns is completely ignored
- The DataTable has always more width than its parent
- even if parent = h:body
- even if I declare only one p:column the table uses more width then the available.
- Sorting leads to graphical glitches
- Column header doesn't fit to the column anymore
Here is a Screenshot: (pixeling is done by me)

Fyi:
- I used the current Snapshot Version from the Maven repository.
- Behavoir was the same on Internet Explorer 8 (with and without compatible modus), Firefox 3.6.8, Opera 10.61

