From what I have read they are a Dravidian people (making them ethnic/racial cousins of the Tamils and other South Indian peoples) living mainly in the central belt of Balochisitan. Does anyone have any more information about these people and their role in Balochistan and Pakistan as a whole?
Are you asking about people who speak "brahvi" language?
is that the same as MAKRANIS? 
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*Originally posted by Qrius: *
Are you asking about people who speak "brahvi" language?
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Yes, it's a Dravdian ethnic group in central Balochistan as I have read.
Irem - Makrani's are from South Balochistan but they are of African origin, not like the Brahui's or other Balochi's of the interior.
everytime i read info on pakistan..all i read was less than a paragraph on brahvi language..so i had to rely on the links for the info..
here’s two interesting pieces of info that i found on brahvi people and language..
In another article i found an interesting theory..so i am posting it here:
The latest theory about the Aryans’ indigenous home has been partly corroborated by Prof Parpola because he admits that the Brahvi was not a Dravidian language as was considered by Bray and some other British and European linguists. There is no connection between Tamil-Sinhalese-Malyalam triad of languages and Brahvi since there were only 180 Dravidian words in Brahvi. The Baloch poet and scholar, Gul Khan Naseer, in his important work Kooch-o-Baloch had also contended that the Brahvis were Baloch - the former belonged to the first wave of the Baloch one thousand years before and the latter were part of the next big wave that made Balochistan its home during the 13th to 14th century.
Hope it helps 