With RB532 and SR2 card, Data rate 1MB 802.11b multipoint AP (15.4 Omni antenna), how far it can go ?
If it is clear LOS (Line of sight) it is said to go a TOP of roughly 10 miles, But that is in the best of conditions, expect more like 2-3 miles (Remember LOS). I plan to have exactly the same setup running (VERY) shortly, except im using a RB 112… I will let you know how far I can get when I get there. Good luck
Jordan 
The biggest factor other than LOS is the client and it’s antenna. If you’re using a laptop, it may not go more than a 1/2 mile. Another SR2 and a 24dbi grid antenna could go as far as 70 miles (but you’d need huge elevation for that). There are too many variables to give an exact answer, but I would expect up to a mile with a laptop and up to 15 miles with a directional antenna on the other side (with clear LOS of course).
Just guesses,
Joe