Try any of the following sites:
Roman Army Page:
http://members.tripod.com/~S_van_Dorst/legio.html
Roman Arms & Armour:
http://www.ncl.ac.uk/~nantiq/arma/
Hannibal & the 2nd Punic War (excellent):
http://www.barca.fsnet.co.uk/home.htm
Roman Army:
http://www.roman-empire.net/army/army.html
Roman Army bulletin board (like TFP):
http://pub45.ezboard.com/bromanarmytalk
Roman army details, battles etc (excellent but some dead links):
http://webpages.charter.net/brueggeman/
Hope this helps mate. If you want some book titles let me know.
Mr Mephisto