It's more of a Zee group channel addition today than a single Tamil or Bengali channel addition. When they actually add Tamil channels, it will be like a flood similar to the recent Malayalam channel Tsunami!
This week may be the blockbuster week for tamil veiwers, TS may add bunch of tamil channels on tamil segment. Eagerly waiting for the breaking news on this forum.
Zee Tamizh already added. More Tamil Channels will only be added after MPEG4 Conversion of all Tamil channels. DD -Podhigai still not converted to MPEG4. Once this is done there will be flood of Tamil Channels just like Malayalam Channels.