Hi, I did a database for hillforts last year its on the yahoo group, Somerset, part Gloucester also, and then started Wiltshire but got bored with it and lost the map I was taking it from. But have done the local ones round bath, as probably Jamie has, I probably blogged those.
The thing about hillforts is not much excavation or information around.
The ones round Bath are; Littledown, Stantonbury, Solsbury and Bathampton. Just down the road on the Cotswold are Horton, Old Sodbury and the Hinton/Dyrham Fort.... the following link should take you somewhere ;)

http://groups.yahoo.com/group/hill_forts/files/DATABASE%20-%20Group%20members%27%20data/

for the west mids worc/shrop area try Wychbury, Woodbury, British Camp, Kinver, Cannock Chase, Bury Ditches and Caer Caradoc

Where have you been, old bean? Sorry bad joke :-)

Just to echo previous posters, I like visiting hillforts too.

My favourites if you ever make it north are the Clwydian Range forts. Hiraddug (near Prestatyn), Y Gaer (Bodfari), Penycloddiau (massive), Arthur (perfectly formed), Y Gaer (Llanbedr - very nice) and finally the majestic Fenlli.

What were hiilforts? Don't ask me. Must have taken some building and it's a bit chilly up there for a des res. Though I think maybe the Clwydian Range forts were the frontline between the evil Deceangi and the noble Ordovices to the west. Just my 2p.