When the network is acting up, you can use Coda to help isolate yourself from the networking problems. Set up your hoard database so that Venus will hoard the files you are working on. Then, disconnect from the Coda servers with the cfs disconnect command. To Coda, this is equivalent to physically disconnecting from the network.
Once the network becomes stable, you can use cfs reconnect followed by cfs checkservers to reconnect yourself to the Coda servers and re-integrate your work. Do not forget to clear your hoard database with hoard clear once you are done working on the set of files that you hoarded.