Recently on SEELANGS there was a query about what reasonably priced phone cards people found convenient to use for calling Russia from the US. Here is the helpful summary. (I've blocked the sender's name so that she not be inundated with spam. (I have edited the format and fixed a likely typo.)

Date: Fri, 5 Oct 2007 08:32:32 -0400
From: msr2003@COLUMBIA.EDU
Subject: phone cards: summary

Thanks to all who responded. For all who are interested, I'll sum up responses: Skype and Master out were the most popular choices.

Any responses not summed up here were posted on the listserv. Again, thank you, generous colleagues!