Shiju,
Thanks for very helpful pointers. Using mailing list to build a community is
a good idea.
We have a Tamil Wiktionary Google group with 192 members at
http://groups.google.com/group/tamil_wiktionary
This has been operational since 2006 and helps people who are not
comfortable with wiki format.
Though, we don't use it for project related discussions, the main objective
of the group is to engage people in Tamil word related discussions and
transfer consensus words to Tamil Wiktionary. We need to coin new words in
so many fields.
We also have many people interested in tracking Tamil Wiki progress and
using the meta mailing list will be good to stay in touch with them.
Ravi