What about the Tamil font support in Android? I just analyzed the stuff behind this.
Tamil like any indic language needs complex script support, which is most important for complex characters in indian languages. This is provided by Pango library in linux systems. Most of the latest Linux desktop/server has Pango library installed by default. Android is NOT.
I just tried installing a tamil font in Android and confirmed this. Though the tamil characters are visibile to some extent, most of the characters are found split into two characters. It is not readable. This mail thread says Android team is working on it. Even which library to use (pango or other such libraries) is not decided yet. It is not available in feature list 1.5 release also.
If any one has other way of getting it done, please comment it here.