Some folks got arrested for allegedly using twitter during the G20 protests this past year. There's some good info about the raid at https://friendsoftor...wordpress.com/.
These raids absolutely do still happen. Also, the guy who allegedly hacked Palin's email account had his house raided. The FBI is also doing raids in response to Anonymous's "Operation Payback".
The government just isn't focused on the petty hackers much right now. Homeland security, political shit and the like are their main focus. The big new scare is cyberwar. Evidence that we discussed at Schneier's blog indicated US and Israel made the threat real by making Stuxnet and slamming Iran's enrichment plants. It was totally brilliant, but payback will be a bitch. The government still raids the guilty and the innocent. Comments on Schneier's "Recording the Police" blog post got plenty of details on that. Here's one example of police corruption that was filmed and resulted in a retaliatory raid.
Motorcyclist Jailed 26 Hours for Videotaping Gun-Wielding Cop
NOTE: People wanting serious discussions on security can feel free to join us at Schneier's blog. I post under Nick P there.