My local GW has a lot of players, I'll try and remember roughly what gets used.
2-3 HE- big blocks of 50 LSG with either damage immune archmage and world dragon or teclis... caradryan is in there regardless. Backed up by bolt throwers. Very nasty to play against but Ive beaten them a few times.
my ogres- previoulsy have played 2 big blocks with characters (1 bull, 1 irongut) but I think Im moving to a block of bulls with minimal characters and then smaller irongut units with the tyrant/BSB/slaughtermaster... of course they are backed up by gnoblars, scraplauncher and gorgers.
WoC- couple of armies. 1 is based on small blocks of warriors with festus and the stupid Lv4 of stealy dice (never remember his name- everytime you fail at anything with PD/DD he steals them) and the other relies on 1 large block of khornate warriors in a hoard with a hellcannon, block of marauders and a unit of cav to support... plus endless tzeentch disc sorcerers. First is pretty easy to beat, 2nd is a bitch.
Daemons- 2 common players, one hasn't used them lately because they are no longer stupidly powerful, the other runs mono-khonre and no tactics... so they are dangerous but you only really lose if you make a few mistakes.
WE- 2 players. Mine is a MSU army with glade guard, glade riders and wardancers plus ancient, Lv2 mage, BSB and noble with little upsets via my eagle and wawatchers. Its designed to draw you forward and blocking big units while the wardencers charge your flanks and most other things flow around you... its an annoying WE army and has been very successful. The other is more of a tree spirit army; Lv4, 2 treemen, big block of treekin, dryads and some glade guard... its an alright army but not the player rarely changes tactics.
DE- many, most rely on a supreme sorceress with dagger in warriors, a hydra and 2 RBTs... but after that it varies widely. With blocks of black guard and BSB still seen but then pretty much all the infantry units are seen, no dragons have yet dared to raise their heads in 8th after being a staple in 7th.
Beasts- 1 army, big reliance on ambush... scary but not for mobile armies like mine.
VC- 3 main, many more. Each is different. 1 is cav heavy with a stupidly expensive deathstar of bloodknights with 2 vamps and a BSB... if you beat that unit you win (but thats incredibly hard). Other 2 are more standard- ghouls, zombies and the odd skely unit... even grave guard occasionally with 1-2 black coaches. Not seen any vargulfs in 8th yet.
TK- 1 player, won't use them until they get a new book.
Bretonians- 2 big blocks of cav, I havent played them but it seems to depend on what you are. Vs hoards they are rubbish, vs elite armies they do quite well.
Empire- 2 armies, hoards of spearmen and a couple of cannons is basiclaly all they have but with knights in 2 ranks... look scary but neither have synergy: their armies try to do lots of different things and so end up doing nothing very well.
Skaven- many, everything you can imagine
O&G- 2- first has loads of units, loads of warmachines... all the units have huge numbers of ranks and has the best magic defence around, very tricky indeed to beat, but not too hard to avoid losing (lots of close games). 2nd is in formation but is based on boar boys... not a great army
Dwarves- MIA, there are a few armies around but I havent seen anyone with them lately.. mainly just luck, they've been used just not when I'm there.
think thats everything. As can be seen we have a lot of players tring a lot of different things, but really dont have any 'gunlines' as such. Saw the odd one in 7th but they arent a local favourite.