Alaska releases updated information on the number of registered voters in each party every month. The August 4 tally is available here.
The only parties which gained between the July 3 tally and the August 3 tally are the Libertarian and Alaskan Independence Parties. The percentages are as follows, with the July tally listed first and the August tally second:
Republican: 26.08%, 26.06%
Democratic: 15.66%, 15.64%
Alaskan Indpc: 2.76%, 2.77%
Libertarian: 1.33%, 1.45%
Rep. Moderate: .65%, .64%
Green: .54%, .53%
Veterans: .38%, .38%
Independents: 52.61%, 52.54%
Parties need 9,786 registrants by the spring of 2010 in order to be recognized for the 2010 election. The only parties that have that many are Republican, Democratic and Alaskan Independence, although those three parties don’t actually need any number of registrants because all three of them met the alternate vote test in 2008. Libertarians currently have 6,956, so still need another 2,830. The formula to be on the ballot in a midterm year is to have registration of 3% of the last presidential vote. That formula was made more severe in 2004; before then, it was always 3% of the last gubernatorial vote. If that were still the registration test, the number of registrations needed would only be 7,119.