JFBConnect + VM2 + VK

1. install social buttons (share, like) on the page items in Virtuemart2 (VK.com, Facebook, G+)?

JFBConnect won't automatically add the social sharing buttons to Virtuemart 2. However, we have easy tools to add the buttons to any extension:
* You can use the JFBCSocialShare module to add the buttons to any module position
* You can use the JFBCSocialShare module to add a 'floating' bar, like the one in the bottom right of this page, to any pages on your site
* You can modify the VIrtuemart2 template files to add our Easy Tags, {JFBCLike} {SCTwitterShare} etc anywhere you want the sharing buttons to display.

2. sign in Virtuemrt2 through social networks (VK.com, Facebook, G+)?

Yes, you can sign in using any of the social networks and have user data automatically imported into Virtuemart2.

It would be nice to see in the demo Virtueamrt with JFBConnect..

We agree. We are planning a new demo site later this year that should show a lot more of the integrations we provide. It's difficult to make a demo for all the different social networks and all the different extensions we support though, but we're working on making it easier to see ahead of time.

As always, we have a 30-day money back guarantee. If you try JFBConnect and can't get it to work how you want, we'll help however we can and you can get your money back if you aren't satisfied.

Thanks,
Alex

1) Yes, you can add it to any spot on your site that you want. You'd need to modify the Virtuemart template file that's creating that item card page, but once you add the code, it will work for all products that use that layout.

2) JFBConnect supports profile import into Virtuemart. The SCLogin module, which adds an improved login interface, comes with JFBConnect. You don't need any other extensions from us or anyone else to add the social network import abilities to Virtuemart.

3) You're free to use JFBConnect on any websites you own, without restriction.

I hope that helps,
Alex