More hypothetical situation.. how to best solve this in MySQL..

[Joost]

Let's make it more hypothetical..this is the problem I want to solve:

- I have 'entries' (businesses etc..)
- Each has several 'tags'
- And a location (latitude / longitude)

I want to create a search like on www.yelp.com. This means:
- Search within map area
- Order on some kind of score
- Match certain tags..

What is the best way to do this? Where should I put everything & what indexes could I create best?

The only thing I have till now (that works great):
- Tags are saved in a TEXT field. The selecting is done using a FULLTEXT MATCH in boolean mode. So an entry tagged with 'car' and 'garage' gets a field 'car garage' on which it is fulltext matched..

But what is the best way to create the rest?