Here are the best tech WordPress themes I've found to date. I've only selected themes with a 4-5 star rating, good support, mobile device compatible and a great techy look and feel. I've listed the PR rating of the theme developer's website next to the theme link as an indication of quality.

Tech WordPress themes

1. Theme: grizzly $40 by wegrass.com pr3 (This theme is for smartphone apps)
2. Theme: gonzo $45 by olliemccarthy.com pr3 (This theme is a review theme for video games, video, apps and news. Very versatile well made theme. Simple, colorful, web 2.0 design.)
3. Theme: producto $55 by syncthemes.com pr3 (This theme is an online store, geared towards tech items like smartphones, monitors, laptops etc.)
4. Theme: flare $45 by bringthepixel.com pr3 (Not sure what this theme was geared to, but it has a tech feel.)
5. Theme: modernize $50 by goodlayers.com pr2 (This theme is generic, but it's minimal and professional design can be used for a tech site.)

Any theme can be a tech theme. The great thing about hosted WordPress websites is that you can easily install plugins and turn any site into a store, forum, blog, review site, news site, gallery, etc. The most important thing to consider when purchasing a theme is whether it's mobile phone compatible, has good support, and is popular. The internet is sharing its traffic with mobile devices more every day. Choosing a popular theme means the author will keep it up to date, to keep his valuable buyers happy, in the years to come.

You might consider the Affordable Website package if you need a WordPress theme setup for you along with hosting, a logo, email list, SEO and support.