Hello competitor! My startup is solving the same problem with a different approach. We're in private beta (this is my first post about it on HN), but here's a secret link that gets you in (and viewing an example micro-review): http://tattl.in/ied9gj
nice! you touched on really valid points. we had the exact same thoughts and decided to try it out at http://yum.sg. still deciding whether to launch it stateside.
If you need a kick in the right direction with font stacks, checkout http://unitinteractive.com/blog/2008/06/26/better-css-font-s... . They have some pretty good advice.
Good luck!