Help! Ex-boyfriend from high school finally tries to contact me after seven years. What to do?

Ok, while I was in high school, I dated this guy for about 2.5 years. I dumped him at the beginning of my senior year cause he was lame--won't get into all that now. About two months after the break up, he carried on trying to win me back and I cussed him out saying it's over for good--he was a real cling-on and obsessed at the time. I hung up on him for good on Oct. 16, 2001. We haven't talked ever since. It's now Oct 2008, and this morning while I was gone still sleeping at my friends house, my ex stops at my place to try to reach me. He didn't know any other way to get a hold of me, since it's been over seven years. Yes, of course, I'm a recent college grad (May 2008) looking for a better paying job than the job I have now (which is at Six Flags) and paying off loans, trying to move out, so I still live at home like a loser--applying my off to about every job opening I see and been gettin few interviews, no fu#k;ng offers yet and it sucks!!! Anyway, while my ex was at my house, he talked to my mom and dropped off a letter for me and left me his phone number on the letter--the number looked very familiar, so he probably is in the same location that he was seven years ago. He basically said that hes been thinking about me a lot and wants to see how me and my family's been doing. He said in the letter that he had some rough times but is doing better now, give or take. He also said that he doesn't have caller ID, so I should leave my number and message if he's not home if I want to chat. I'm so creeped out that he tried to reach out of the blue after seven years. I don't know--should I hear him out to see what he's been up to?? Should I be more open to call him just to chat, no strings attached? I don't want to rekindle things here and lead him on in anyway or some other bullsh*t. I hope he's not trying to get back together with me, hopefully he's moved on and already has another girlfriend! I wonder if he's contacting me cause of economic rough times--he wants to try to catch up and chat with my parents too. My other ex from college (I dumped him over a year ago cause he was even more lame) tried calling me a few weeks back--really creepy. My two ex boyfriends trying to contact me in the same month--THIS IS A REALLY AWKWARD SITUATION! I'm nervous. My parents say that ex from seven years ago was a really good guy and they really liked him. So should I call him after seven years to see what he wants or am I wasting my time? I thought it would be fun to get other people's opinions here, seriously, what would anyone else do in my situation?