I like the idea of couch/lap quilts.

I've made a wall hanging and included blocks where quests at the celebration can write their names and/or comments

I have made a queen quilt for a king sized bed. When there is a bed skirt on the bed, it is okay if the quilt only goes just past the top mattress, because the skirt takes over the rest of the sides of the bed. If you made a queen size, I am willing to bet your friend will find a great use for it, even if they don't use it on the bed.
That said, a quilted throw or lap quits for both are a fantastic idea!

Those are my feelings also. I think lap quilts would be great gifts (I know I'd be thrilled to get one as would my DH). Pictures when you're done please!!!

Your friends are very lucky to have a friend like you. If you really want to make a King sized quilt, why not consider making it in two halves that zip together? Extra long, separating zippers are available online.

Great idea to make 2 lap quilts.

Go for the his and hers lap quilts so you can enjoy the process.

I think his and hers lap quilts are a great idea simply for the reason as one mentioned--a bed quilt is a personal decision and unless you actually KNOW That they want what you are going to give them, you may be doing a lot of work for a quilt they don't appreciate.

Side note:

I've actually read that giving gifts of a "decorative" nature is often asking for disaster as many times we don't have the same tastes as the receiver of the gifts. The author of the article said that as she looked around her house the things she really didn't like that were in the house, were all gifts. She felt like she had to use them because they were gifts, usually from family, but they weren't her style. This article was "before blogs"--in a magazine somewhere. Ever since then, I've thought about that and realized it is true. Often people give what THEY like, but not necessarily what the recipient loves.

My vote is for the lap quilts, anyway, esp. if the men's lap quilt is "masculine looking".

I think your idea of lap quilts for the other couple is perfect. I would be delighted if I were them!!!

Great Idea