When we took on the WHW three years ago we aimed for cheap(ish) accommodation and, being a member of Camra, visiting lots of Good Beer Guide pubs.
Arriving in Milngavie we stayed overnight in The Best-Foot-Forward B+B, a great place, not cheap, but Morag has it sorted. The Travel-Lite people will pick up your rucksack from here, so you don't need to even carry it to the official start

The Talbot Arms in Milngavie serves an excellent choice of beers.
The Carbeth Inn at Blanefield comes highly recommended, having been in the 2010 GBG. Next up there is Drymen: the Winnock Hotel was where we stopped but this year, we intend visiting the Clachan Inn (listed in the 2011 GBG).
Sadly there's not much to report until you reach the Bridge of Orchy Hotel, with three traditional ales and excellent bunkhouse accommodation. Have not visited the Drovers at Inverarnan yet but intend making it a lunch stop this year. There is a bar at Beinglas Farm, but it's nothing special.
The Kingshouse in Glencoe has been in several issues of the GBG over the years and rightly so. It serves a superb range of ales but accommodation is not cheap.
Next to Kinlochleven and the Tailrace Inn. Good beer, but choice has reduced in the past couple of years from two handpumps to one. There is, however, the rarity of a fish & chip shop opposite. There is good bunkhouse accommodation in Kinlochleven.
Finally, Fort William. There are 3 listings in the 2011 GBG. The Ben Nevis Inn, at the start of the path to the great mountain, is excellent, if a little out of town. On the High Street you have two hostelries close together: the Cobbs at Nevisport and the Grog & Gruel are both adjacent to the 'new' finish of the WHW.
Happy walking (and drinking)

Apologies to the Oak Tree Inn at Balmaha, serves excellent traditional ale.
Sadly the Atlas Brewery, mentioned in the WHW Rucksack Reader, in Kinlochleven, is no longer there!! It closed in 2010 and production was moved to Orkney. I was looking forward to a brewery tour this year but I am NOT walking that far!!