Actually, Facebook will give you the email address if the user
authorizes it. 
http://developers.facebook.com/docs/authentication/permissions/  You
have to request the "email" permission.

In Janrain you need to have the Pro package[1000/year] and you can then
map multiple social networks to the users profile, and then map the
janrain profile fields to your internal profile fields.   If Janrain
goes out of business, then you will either need to reset the password[by
sending it to an email address, or even as an internal social network
message to one of the mapped social network accounts], or implement an
authentication package to re-authenticate those accounts.

The nerd in me says I'd rather implement it myself.  But if I never get
back to updating/maintenance in a year it will be out of date, wheras
Janrain will keep updating.

On the other hand, with time on my hands this summer, and seeing pricing
of 1000/year for a single domain to use Janrain, maybe I should
implement it myself with a Rest interface and then try to resell it. :-)

-Gary

On 5/26/2011 1:17 PM, Donna Marie Vincent wrote:
> Joomla user accounts are created but some social networks won't give
> you the users' email address.  This would be the case if you use the
> Facebook Connect with or without Janrain.
>
> If you weren't using Janrain, you can use the various social network's
> API to create the same plugin.
>
>
> ------------------------------------------------------------------------
> *From:* forest mars <[email protected]>
> *To:* NYPHP SIG: Joomla <[email protected]>
> *Sent:* Thursday, May 26, 2011 12:37 PM
> *Subject:* Re: [joomla] Opinions sought re social logins
>
> I'd be interested in knowing how does Janrain actually work especially
> WRT the long-term viability of this approach.
>
> IE, Let's say I have a site with 5000 users who have used Janrain to
> sign up (using a mix of fb, twitter, gmail etc.) and Janrain goes out
> of business, gets acquired, whatever.
>
> What happens to the user accounts, do they have to sign up again, or
> does it just create local accounts with passwords and an email address?
>
> It seems there would be a trade off between usability and lock-in, and
> I'm just not clear on how Janrain works.
>
> cheers,
>
> fm
>
>
> On Wed, May 25, 2011 at 8:15 PM, Scott Wolpow <[email protected]
> <mailto:[email protected]>> wrote:
>
>     It is the same as having a Joomla Core account. Except rather than
>     checking core, it checks elsewhere.
>
>     SW
>
>
>     On 5/25/2011 7:55 PM, Donna Marie Vincent wrote:
>>     How is that different from a user creating multiple Joomla
>>     accounts with different email addresses?
>>
>>     Once you sign in with one social network it remembers which one
>>     you used and presents it to you as the first option.
>>
>>     ------------------------------------------------------------------------
>>     *From:* Paul Hoffman <[email protected]>
>>     <mailto:[email protected]>
>>     *To:* Joomla Users Group List <[email protected]>
>>     <mailto:[email protected]>
>>     *Sent:* Wednesday, May 25, 2011 7:52 PM
>>     *Subject:* Re: [joomla] Opinions sought re social logins
>>
>>
>>     That would be  allowing  many different login for 1 person unless
>>     you only allow 1 ip or  usage .Personally i use a few different
>>     emails so i would be a candadate for a few accounts( not purposly)
>>     Also  many have multiple social accounts !
>>     --- On *Wed, 5/25/11, Donna Marie Vincent
>>     /<[email protected]>
>>     <mailto:[email protected]>/* wrote:
>>
>>
>>         From: Donna Marie Vincent <[email protected]>
>>         <mailto:[email protected]>
>>         Subject: [joomla] Opinions sought re social logins
>>         To: "Joomla Users Group List" <[email protected]>
>>         <mailto:[email protected]>
>>         Date: Wednesday, May 25, 2011, 7:39 PM
>>
>>         I have a Joomla site (not live yet) set up with Janrain
>>         login.  http://www.janrain.com/products/engage/social-login
>>
>>         Users can login to the Joomla site with their Facebook,
>>         Twitter, AOL, Yahoo, Gmail or LinkedIn account.
>>
>>         I think this would make it much easier for users to join the
>>         site and participate in the site.  But I'm wondering what the
>>         downsides might be.
>>
>>
>>         -----Inline Attachment Follows-----
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>>
>>     Show Your Participation in New York PHP
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