This is one list I have seen, and it is the one we currently use.
110th CONGRESS
1st Session
S. 681
To restrict the use of offshore tax havens and abusive tax shelters to inappropriately avoid Federal taxation, and for other purposes.
IN THE SENATE OF THE UNITED STATES
February 17, 2007
`(E) INITIAL LIST OF OFFSHORE SECRECY JURISDICTIONS- For purposes of this paragraph, each of the following foreign jurisdictions, which have been previously and publicly identified by the Internal Revenue Service as secrecy jurisdictions in Federal court proceedings, shall be deemed listed by the Secretary as an offshore secrecy jurisdiction unless delisted by the Secretary under subparagraph (F)(ii):
`(i) Anguilla.
`(ii) Antigua and Barbuda.
`(iii) Aruba.
`(iv) Bahamas.
`(v) Barbados.
`(vi) Belize.
`(vii) Bermuda.
`(viii) British Virgin Islands.
`(ix) Cayman Islands.
`(x) Cook Islands.
`(xi) Costa Rica.
`(xii) Cyprus.
`(xiii) Dominica.
`(xiv) Gibraltar.
`(xv) Grenada.
`(xvi) Guernsey/Sark/Alderney.
`(xvii) Hong Kong.
`(xviii) Isle of Man.
`(xix) Jersey.
`(xx) Latvia.
`(xxi) Liechtenstein.
`(xxii) Luxembourg.
`(xxiii) Malta.
`(xxiv) Nauru.
`(xxv) Netherlands Antilles.
`(xxvi) Panama.
`(xxvii) Samoa.
`(xxviii) St. Kitts and Nevis.
`(xxix) St. Lucia.
`(xxx) St. Vincent and the Grenadines.
`(xxxi) Singapore.
`(xxxii) Switzerland.
`(xxxiii) Turks and Caicos.
`(xxxiv) Vanuatu.
I have not had time to review it completely, but here is another source of information on tax havens that is more current.
http://assets.opencrs.com/rpts/R40623_20090709.pdf