BBM can't communicate with non BB devices currently so, no.
As for what's coming down the road -- check the rumor mills if you really want rumors. There was discussion regarding release of BBM on other platforms.
As slow as RIM is to get anything released these days, I would probably just get your blackberry freinds to use google talk or one of the many cross-platform chat applications that are available.
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Try here for starters: Top 5 free BlackBerry Messenger-style cross-platform chat apps