You've never seen a group of programmers and designers flip out over someone like they did over Peter Semmelhack, CEO of open-source gadget company Bug Labs, at SXSW this morning. (That is, unless you were at Jonathan Coulton's show at the PopSci.com party last night. Grown men pulling their thinning hair and jumping up and down, that sort of thing. But Semmelhack's crowd came close, and they were sober.)