Well here is the Tides Foundation's latest 990 form;
http://www.tidesfoundation.org/documents/Form990_2003_TF.pdf
Look through it they gave money to the National Lawyer's Guild, an old communist front group still plugging along.
Other then that it is the normal range of Leftist causes, but I leave it to others to find if they are laundering dollars to terrorists, which is hardly unlikely.
Looking through some other years, they *have* given money to terrorists directly.
Most notably in 2000 to Friends of the Earth - an enviroterrorist group.