Moose answered your questions pretty well. TG2 can import the .CHAN animation format, although it's not its "native" animation format. Because TG2 uses human-readable XML files for scene description and you can animate virtually any parameter, it does not currently have an explicit and separate animation file format. If you can write simple software you could convert a TGS script to TG2 .tgd XML format, or create a program that writes directly to .tgd files. When you animate in TG2 the keyframes are stored in the .tgd as sequential sets of values for a given node. Keep in mind that all animation functions are only available the "Deep + Animation" version.
For your second question I assume you are referring to water transparency. As Moose stated this is a feature not yet available in the current public Technology Previews, but it will be available in the beta (for registered users only). Once TG2 is released it will also include this feature and the free public version will be updated some time after that.
- Oshyan