If you don't mind moderately difficult games (my personal preference) I strongly recommend taking a look at the blurbs for these few tremendously good games and seeing if they appeal to you:
Another game with moderately easy puzzles that might appeal to the HN demographic is Dan Schmidt - For A Change. The setting is an abstract, somewhat pastoral landscape full of things whose descriptions are alien but extremely evocative. The theme of the puzzles is imagining and understanding things about the world of the game. I found it rather entrancing.
Spider and Web is one of my favorite examples. It plays to the medium's unique strengths in ways that will be obvious to anyone who goes through most of it. It's also a fairly short game.
Violet is a fun, short, one-room game. You have to finish writing the last thousand words of your PhD thesis, or your girlfriend Violet will leave you and go back to Australia. Mostly this means you have to figure out how to deal with distractions. The characterization and narration (in Violet's voice) are charming.
These aren't Infocom games, they're recent games written for Inform. You should be able to find them online, probably playable in the browser.
