CHANGES IN VISA REGULATIONS:
1. A foreign citizen can obtain a visa to Russia ONLY in the country of his/her citizenship. Exceptions include those who have a residence permit for a foreign country for the period more than 90 days. A visa may also be issued in a country other than an applicant’s own in case of urgent necessity, such as participating in international, governmental, official, scientific, sport and cultural events. A final decision in these cases would be left up to the consulate.
2. A multiple entry business visa allows nationals of all countries to stay in Russia up to 90 days out of the period of 180 days.
Attention: a multiple entry visa is only available for people who have been issued a Russian visa before.
A copy of your previous Russian visa should be enclosed in your application for a multiple entry invitation.
If this is your first visit, you are only eligible to obtain a single or double entry visa for 1 to 3 months.
http://kylekeeton.com/2007/12/russia-visa-terror-continues.h
http://kylekeeton.com/2007/11/russian-visa-rules-are-changin
http://kylekeeton.com/2007/11/russian-consulate-locator.html