JW,
Glad you're liking JomSocial. It's a huge extension, which I think actually does too much nowadays. Frankly though, what it does, it does well... so you can always grow into it.
For hiding the 'Name' field, it's pretty simple actually. You'll want to do it in the /components/com_jlinked/views/loginregister/view.html.php file though. Around line 45, you'll see:
$this->form->setValue('name', null, $profile->get('first-name') . " " . $profile->get('last-name'));
Add the following line after that:
$this->form->setFieldAttribute('name', 'type', 'hidden');
Hope that works out for you, but if you need more help, just let us know!
Thanks so much for the review.. we definitely appreciate it!
Good luck,
Alex