Notice a difference?

If you feel better after exercising, you are already noticing a difference. Be aware of the changes happening in your body. It may be easier to get out of that chair. You may not be out of breath after climbing those stairs. You may find yourself wanting to move more. It's hard to say when you will see results in the mirror, but that doesn't mean you won't notice a difference.

Hmm.. yeah I was doing pretty much no exercise before and no I havent been doing any resistance/weights, whats resistance? Should I be using the gym as well?

Resistance is basically anything that's more than just cardio. I.E. there's something called bodyweight training which (minimally) is things like push ups, sit up, pull ups, squats, lunges...etc. Things that use your body weight as resistance for specific muscle groups. Then their's weight assisted resistance training (I.E. doing the same types of exercises but with dumbbells or in some cases barbells). Then there's the cable pully machine (that big machine that looks like a square Arch but it has cables all over it, you can do a multitude of different exercises on it, very versatile, I love the cable machine!). Then their's straight weight training, which is usually defined as going to technical failure (I.E. you can't do one more because you're muscles can't finish the routine with good form). These are all things that help define your muscles and help you to gain functional strength. Just about every woman on those fitness magazines employ 3 to 5 days of this type of training (although most of those magazines do some pretty serious "touch up" on the pictures). As opposed to the super skinny women on the fashion magazines that are thin, but have little muscle mass (not my idea of sexy!).

At about 1lb per week, others probably won't start commentinting or noticing your weight loss until the very end (maybe10 weeks from now). Honestly, we've found on the board that the compliments really start coming around 15-20lbs lost.

Yeah, I am just now getting compliments at the copy machine. Co workers aren't asking me if I'm losing weight but how I'm losing the weight.

For my first 20 lbs I did mainly cardo and no weight training. How vital is the weight training/resistince training?

looking good doesn't hurt either.

Um, this is true. Not in a narcissistic way, even. When you like the way something looks, you're more likely to take better care of it to prolong it's use and appeal. It's basic human psychology at work. Looking sexy? Heck yes.

So I just switched my routine from 45 min cardio to a 30 min cardio followed up with a 30 min strength training.
I've noticed that my HRM gives me the same calorie consumed, does this seem right, is this a good switch?
Any thoughts?

that would depend on both the cardio you do and the strength training. I'm not a big fan of weights after cardio, if anything you should do a short warm up, then weights first, then cardio. Although 30 minutes probably isn't long enough to deplete glycogen stores to the point where it will cause serious setbacks.