It's a simple tool scripted in javascript.

EDIT NEW DIRECTIONS: Go to the rankings page. Click families sorted by networth. Copy the data that looks like the example:

1    Cereal Killers (1117) (x:29,y:26)     8    8800
2    (1122) (x:38,y:32)     8    8800
3    (1121) (x:39,y:58)     7    7700
4    Samurai Warriors (1111) (x:14,y:1)     7    7700
5    (1115) (x:49,y:36)     6    6600
6    CEREAL EATERS (1106) (x:15,y:47)     6    6600
7    (1114) (x:4,y:1)     6    6600
8    (1104) (x:58,y:12)     6    6600
9    (1119) (x:26,y:43)     6    6600
10    (1113) (x:10,y:38)     6    6600
11    (1116) (x:36,y:48)     6    6600
12    (1108) (x:47,y:26)     5    5500
13    (1110) (x:52,y:54)     4    4400
14    (1120) (x:23,y:54)     4    4400
15    (1118) (x:9,y:20)     3    3300
16    (1112) (x:19,y:30)     3    3300
17    (1107) (x:40,y:10)     3    3300
18    (1109) (x:19,y:16)     3    3300
19    (1103) (x:4,y:29)     3    3300
20    (1105) (x:59,y:38)     2    2200

paste this into the calculator. Type in your families number where prompted. Also type in the galaxies dimensions where prompted. Click calculate.

You'll get a distance calculation from your home system to all the other home systems so you can see what family is closest and is the biggest threat.

EDIT: Here's the new version. Now accounts for the warp and different size galaxies.
Also changed the look of the tool :-)

Added a button for reseting the calculator for a second calculation :-)

Refresh if you don't see them.

version: 0.6
http://h1.ripway.com/imsome/ICdistance.html

Would anyone mind hosting the tool?

Suggestions for improvements? Maybe you think it's useless? Post please.