I tweet mostly about science using
the most popular 140-characters tool.
These are some of the guys I follow:
Johnatan Eisen ( @phylogenomics )
Metagenomics, open access science, PLOS
Titus Brown (@ctitusbrown)
Metagenomics assembly, bright and funny guy
RichardDawkins (@RichardDawkins)
Brilliant evolutionary biologist, great speaker
Neil deGrasse Tyson (@neiltyson)
Brilliant scientist and science advocate
Photography
I love capturing pictures from my family life as well as landscapes. And luckily for me, British Columbia provides me plenty of beaches and mountains.
Digital photography school (many great tutorials and classes)
Wired magazine photography section
Technology
Ars technica, The art of technology
Lifehacker, Tips, tricks and downloads to get things done
Wired magazine , The first word on how ideas change the world
Geekines
Technabob, Gadgets, gear, gaming and geek stuff
XKCD, A webcomic of romance, sarcasm, math and language
Reddit, The frontpage of the internet