Grooms parents - I'm doing flowers for all the mums (my mum, my stepmum, and fiance's mum). All parents will also get thanked in the speeches. I don't think you need to do much more than that. Although they may not have contributed much to the wedding, they made your future husband, so they deserve some thanks and recognition, but I don't think you need to go overboard. If you have got a bigger present for your own parents, maybe consider giving that to them in private? That way, it won't put your future in laws' noses out of joint.
I think a wine glass is a lovely idea. I went to a wedding on Saturday, and they all had champagne flutes with this on. If you have time and are feeling crafty, you can get a wine glass/champagne flute (IKEA is good) and some glass paint from the range and make your own!
I'm also going to put together a small giftbag for each of my bridesmaids to open on the morning - I'll put some nice toiletries in there, and am making the jewellery for them to wear on the day. I'll also put other things in, like maybe a compact mirror and tissues for on the day use!
Regarding the flowers - do you know where she is based? Maybe pop on round? If not send an email giving her 48 hours to respond or you will be expecting a full refund and taking your business elsewhere. However, do bear in mind that wedding season is drawing to a close, and she may have just been flat out, particularly if she works for herself. Loads of my suppliers have been slow to reply over the last couple of months. So maybe send a nicer email first explaining that you are concerned that you haven't heard from her, and could she get back to you by the end of the week.
Good luck!! How long have you got left to go? x