Hi Nikki,
Hello there and welcome!
Disclaimer: This is a little lengthy because speaking as a web site administrator, this is a topic near and dear to my heart. You have the right to ignore this post. 
When we organized our 10-year reunion I used Classmates.com a lot. Although I did get have a Gold account that year I don't think it was required like it appears to be now. At that time, one of the main 'Gold Member benefits' was you could read complete profiles of other members, as opposed to a teaser profile.
That was in 2001. In January of this year, I sent someone an e-mail on Classmates.com. At that time I was back to their free, basic membership.
Sure, I could send the e-mail. Sure, the recipient would get an e-mail stating I'd sent them an e-mail. But in order for the recipient to read my e-mail, now either I'd have to pay for a Gold Membership or the recipient would. On the Classmates website in their 'Member Rewards' section it even says one of the benefits of a Gold Account is: "Send Classmates Email anyone can read / Read all your Classmates Email" To add a little to the frustration (I really didn't want someone to have to pay for a membership just to read an e-mail I sent them) there's no way on their site to tell who's a Gold (paying) member and who isn't.
Anyway, when I sent my e-mail to a person on Classmates.com I got an alert from Classmates worded along the lines of, "Sign up for a premium account, or make your friend pay." That just seems so weird.
Now I can understand paying to e-mail people (maybe) if Classmates had a terrific way for a paying members to e-mail an entire class group at once, but they don't offer that. Regardless of what type of member you are you have to send each person an individual e-mail, and there's a limit to how many you can send a day. I know this because I decided I would get a Gold account again this January, so I could e-mail CHS people about this site, and not have to feel bad about all the lovely notes Classmates.com would send those people about upgrading so they could read my e-mail. I've sent out 380 individual e-mails so far. Not spamming people - I'm just sending one per person (ok, 1 or 2 people have gotten two e-mails because I've messed up)

Out of those 380 e-mails 238 are still unread. So 63% of the people are blocking/junk filtering Classmates e-mails, don't check their e-mail or have changed e-mail accounts. I only know
those stats because I import their lame Message Center > Sent Box into Excel so I can alphabetize names to reduce duplicate e-mails and watch read/unread stats.
As the Internet gets more community-oriented and websites offer more ways for people to stay connected and share their lives (think sites like MySpace, YouTube, or any site where you can add comments, reviews, write on forums, add photos or videos, etc.) I think it's an absolute crime when other sites still think it's ok to charge for the most basic of services. Classmates.com gets enough money enough different ways without having to 'make people pay' for things like sending guilt-free e-mails.
I do agree -- Classmates.com is helpful. But I don't think Classmates.com's new system of paying to read e-mails, paying to post on forums, etc., is something anyone should have to pay for. Extra-especially because of consumer complaints I've read about them in recent months. In December 2006 PC World categorized
Classmates.com into their 'Big Hassle' category for cancelling memberships. As a rule I'm pretty put off by paying for anything I don't think I should have to pay for. Maybe that means I'm cheap. Maybe it's a web designer thing. Or maybe that's a Cudahy thing. Whatever the case, there are probably others that feel the way I do. Regardless, people can use both sites and more, but here I can guarantee they'll never have to pay.
Thanks very much for your post, Nikki. I've actually been meaning to write something about this, because it was one of the reasons I decided to make a full CHS alumni site, as opposed to just one for my graduating class.
Very best (and again, welcome!),
Melissa