Small update here.
We have created ChipMixer plugin for Electrum. It allows you to tumble your bitcoins with us without leaving your wallet and it is even easier to use than website (prefill forms, creates new wallet and imports private keys for you).
You can check readme and screenshots here:
https://github.com/chipmixer/electrum/tree/plugin/plugins/chipmixerPull request is pending, maybe it will get included in next version of Electrum.
If this is a small update, I'd expect to be blown away by a big one! This is excellent news (professed Electrum user here). Even if I'm unlikely to use the service much, having the option to use is one less reason to move away from Electrum. There are a number of other mixer plugins out there already, but none with chipmixer's side bet option.