WebMoney OpenID allows you to log in at OpenID-enabled sites using your WebMoney Keeper.
Your identifier looks like (your WMID).wmkeeper.com
This technology becomes more and more popular, you can use it at LiveJournal.com, Softkey.ru, Webplanet.ru, Moskva.fm, stackoverflow.com, SourceForge.net
Every WebMoney user has email address (your WMID)@wmkeeper.com
To use it please visit email service