I setup the wiki / blog for our team using Confluence from CIT. This will keep ideas and thoughts more secure and internal (only Cornell community can login to Cornell Confluence, and only the members of our group have access to this "space"). "Space" is what Confluence calls each group / wiki.
A wiki is simply a type of website / database in which all users can edit, create, and upload information. This allows more independence and flexibility, so that not 1 person is in charge of it all. I thought this kind of setup is just what we need to document our thoughts in working on the project. I've experimented with Atlassian Confluence before for another club, but it wasn't quite what were looking for at the time, and the interface was a bit glitchy. Since then, Cornell has updated its version of Confluence to version 3.5, but it is still lacking the marvelous features found in the most recent version, version 5.0. However, I think what we have will be more than enough to keep things running.
We will use BOX to store documents, references, and large files and use the blog section of Confluence to document each person's thoughts and work progress. See Useful Websites.
For the rest, today was a slow day. We bought more #41 chain in order for the chain to go the whole length of the erg. Joining the sections of the chain proved to be difficult. We then attached the retracting bungee in parallel according to the plan as mapped out in Figure 3. 
Figure 1: The original design, from Drew Tennant's 2004 paper. The floating pulley kept running into the flywheel during stroke. In addition, we wanted to separate the motion of the handlebar and the flywheel. This made us switch out the floating pulley with the differential, as show in [Figure 2|].
Figure 2: Version with differential replacing floating pulley and resistances (bungees) connected. This did not seem to work as well as the floating pulley design, and we were scratching our heads wondering why. After skyping with Prof Ruina on Saturday 2013.06.01, we concluded to try to recreate the gear ratios from the floating pulley design. This is reflected in our modified schematic in [Figure 3|].
Figure 3: This is an updated schematic of Figure 2.
We ordered S2a and S2b and S3a sprockets yesterday, in the number of teeth as shown [Figure 3|]
Tomorrow, we plan on finishing assembling the bungee and chains according to the updated figure.