People (including Yours Truly) have been saying what they've been doing in their games in Darth CookieMonster's "HG/SS is OUT!" topic. Now I'm not sure where to post that info.
Anyhoo, I'm below Goldenrod City, about to level Muscle (the Machop you get from Jose in the department store if you give him a Drowzee) to level 18. I'm thinking about going after Whitney and Co. in the Gym after that.
The rest of my crew consists of Croconaw, Pidgeotto, Geodude, Flaaffy, and Oddish.