Maybe everyone already has tried this and maybe even think it's a silly solution, but...
I've tried my Composite to VGA converter (used for my Dreamcast) on my Amiga and it works great. Sure, it's a poor man's graphics solution, but it allows anyone with an Amiga to use the standard 15KHz resolutions on their nice 19inch SVGA monitor! :-D
You can get these things on eBay for $15 usually. And no, unlike redrumloa I don't have one for sale! lol