magdalene,
Right now I am using the machines at the health club. I would like to move on to free weights for some things eventually (probably upper body). I have to be extremely careful about form because of my back problems. It’s easier to keep correct form on the machines because the pads give you a guide to proper form. I also hired a PT - it’s so easy to do weights wrong and injure yourself, and I didn’t want to risk it. If you’re not sure how to start, and if you can afford it, I’d really recommend getting a Personal Trainer. I see people using the machines wrong all the time. One of the other advantages of the machines is that you don’t need a spotter.
If you start lifting weights, stick to relatively low reps and high weights. Frankly, if you (generic you) are going to do low weights with high reps, you might as well just do cardio - you’re not going to increase strength much at all. Lifting a five pound weight all day isn’t going to get you anywhere. Low reps with high weights to failure will increase strength and muscle mass, but it will not turn you into Arnold. I’m a beginner and I generally do two sets of twelve of each exercise (2 sets of 15 for some lower body exercises). By the time I get to the last rep of the second set of an exercise, I am about ready to die on most of them - I couldn’t do another rep if someone put a gun to my head. Once I hit a plateua on strength gains with two sets of 12 (which will probably take a long time), I am going to decrease the reps and increase the weights. I go two to three times a week and never lift weights on consecutive days - presumably the muscles need time to recover, and it’s the repair to the muscle fibers that gives you more muscle mass. If you’re going to alternate upper body workouts with lower body workouts, it’s supposed to be ok to lift weights every day. Also, if you don’t rest much between sets you can get a decent cardio workout at the same time. I hate doing cardio; as a consequence, I never do it.
I warm up with 5 to 10 minutes on the treadmill (did I mention I hate cardio? :)), then I lift, then I stretch out for at about 10 minutes. I have never had a workout-related injury.
“Weight Training for Dummies” is a decent book to start with - one of the weight training gurus on a newsgroup I used to hang out on recommmended it to me.
And let me warn you - if you start lifting, you’ll be incredibally sore for the first few days. I had my very first weight lifting workout on a Wednesday, and on Friday I was walking around like my 90 year old grandmother (well, she’s dead now, but you know what I mean). Had my second workout on Saturday. I was still really really sore. But by the time I got to my third session on Monday or so, I wasn’t sore at all after the workout - muscles burned like hell during it, but I felt great afterwards.
I also make a point of stretching any muscle I’ve worked particularly hard right after the exercise, rather than waiting til the end. I also drink about 48 ounces of water during my workouts.
And as far as vibrators go, I think I’ll bring my new big purple “jelly” vibe to ChiDope - much more effective than that hard plastic one. It should fit in my purse. If not I’ll just have to carry it. 
Omni, are you reading this thread? From work, I hope.
<we need a smilie for evil grin>