In order to stop being prompted for a username and password when using salesforce try this. This seems to only pertain to Firefox from what we've seen so in Firefox open the Tools menu and select the "Clear Private Data" option. You can uncheck all of the options except for 1. Cache and 2. Authenticated Sessions.
How and when does task data from Salesforce get sent to POD? When POD reads changes, it stores them in its database. They will be integrated the next time the project is opened .