I recently met up with a 3rd cousin and his wife for the first time who had contacted me through GR...we've been emailing each other for about 2 years. I'm usually painfully shy with people that I don't know but, although I wasn't expecting to, I felt that I'd always known them as we got on so well
We are definitely going to keep in touch and see each other when we can...we live a fair distance from each other.
Some of the distant cousins that I've found have just wanted to exchange information and are not interested in finding out about anything else but, some have been really chatty and we've built up quite a good rapport where we tell each other about what's happening in our lives via emails. Most of my distant cousins live abroad so meeting up with them hasn't come up yet, neither has speaking to them on the phone. I personally wouldn't have a problem exchanging phone numbers eventually, but would prefer to get to know them pretty well (as well as you can emailing) before doing this...as I did with my 3rd cousin.
As far as putting cousins in touch with each other goes, you definitely have to find out if both parties agree to this before giving out email addresses...I've done this successfully several times.
Like you, I'm happy to share my research but some people aren't. I usually send what I have...and don't really care if they don't have anything to give back...I'm just happy to have found another cousin.
Elaine