According to Mr. Mahadevan, the first sign on the celt depicted a skeletal body with ribs. The figure is seated on his haunches, body bent and contracted, with lower limbs folded and knees drawn up. The second sign showed a jar. Hundreds of this pair have been found on seals and sealings at Harappa. Mr Mahadevan read the first sign as “muruku” and the second sign as “an.” In other words, it is “Murukan.” The earliest references in Old Tamil poetry portrayed him as a “wrathful killer,” indicating his prowess as a war god and hunter. The third sign looked like a trident and the fourth like a crescent with a loop in the middle.[Discovery of a century" in Tamil Nadu via email from Anand Krishnamoorthi]

Does this mean that Harappans and the people of Tamil Nadu shared a same language? Iravatham Mahadevan, an expert on Indus Valley script thinks so.

He said: “`Muruku’ and ‘an’ are shown hundreds of times in the Indus script found at Harappa. This is the importance of the find at Sembiyan-Kandiyur. Not only do the Neolithic people of Tamil Nadu and the Harappans share the same script but the same language.” In Tamil Nadu, the muruku symbol was first identified from a pottery graffiti at Sanur, near Tindivanam. B.B. Lal, former Director-General of ASI, correctly identified this symbol with sign 47 of the Indus script. In recent years, the muruku symbol turned up among the pottery graffiti found at Mangudi, near Tirunelveli in Tamil Nadu, and at Muciri, Kerala. But this was the first time that a complete, classical Indus script had been found on a polished Neolithic stone celt, Mr. Mahadevan pointed out.[ Significance of Mayiladuthurai find]

Refering to Sumerian Lexicon at http://www.sumerian.org/sumerian.pdf , I found the following:
Me = responsibility; function; office
lu = men; people
ha = diverse; numerous

Putting together it would mean ‘(A country where) people shared diverse responsibilities (in government)’, unlike the kingdoms of Sargon and Pharoahs.

I was going through the posts once again. In looking at the seal again, it seem to depict “Valli” being asked by Muruga in marriage. Valli is supposed to have been found in the forest in between “Valli Kodi” by her dad and hence the name “valli” for her.

Valli also means creepers. Kodi also means “fire” – As the creeper’s leaves looks/spreads like fire. The lady inside the creeper is Valli. This doesn’t look like the usual tree depiction that is found in other seals, it looks like a creeper. The person kneeling in front is Murugan asking Valli to marry him.

Semmeen-ezhumin-vizhavu – which is also celebrated as panguni vizhavu (or panguni mayakkam!!!) is to celebrate muruga’s marriage. Semmeen (Aathi-irai star) and Ezhumin (can be looked at as ezhu meen – palisades) is depicted in the picture as well. Refer to http://en.wikipedia.org/wiki/Ancient_Tamil_country for tamil festivals.