Hi Beanstalk,
I've had GD for the last six weeks, another 7 to go. My blood sugars weren't massively high, but were high enough to be over the limit, when I had the two hour GTT.
The most important thing, which took me an age to get my head around - don't feel like a failure! (I did) It's just your body not being able to deal with it, and it's nothing you've done wrong. (not that you're saying that!)
I've stuck to the GI Diet (there's a great book, with recipes - it even has a pizza recipe, which has satisfied those cravings), and have even been able to eat out and have Indian meals (Chinese is a no-no) - so don't feel like you'll be missing out - it's all adaptable!
GD doesn't always result in a large baby - we're having our next growth scan a week today, and I was told as long as I can stay in control, everything should proceed as normal - and the last few weeks (I'm testing the sugars in my blood 4 times a day) my levels have been pretty good - helped as I've had to take two Metformin with breakfast, and one in the evening with my meal. I've also lost weight - which wasn't something I expected (and still does my head in!).
The only risk to the baby is if you can't control the diabetes - but you'll be very closely monitored, and if your docs are anything like mine, you'll get to know them on first name terms :-)
Oh, and you know, 0% jelly with 0% greek yoghurt has never been so tasty, every time I fancy a dessert of some kind... and as for the sugar-free ice pops...! Burgen bread is also good for low-GI sandwiches - pricey, but good. I had to give up cereals for breakfast, as they were too sugary.
Good luck, anyway - I wont waffle on too long!