Tom Champion must have seen this post, as he e-mailed me an Excel spreadsheet with the unofficial 2008 Somerville election results. I don't see a good way to paste it in here without wrecking the format of this page (it has 30 columns). So I'll just include the citywide results from 2008:

Total votes: 32815
Obama-Biden: 26450 (80.6%)
McCain-Palin: 5197 (15.8%)
Nader-Gonzalez: 295 (0.8%)
Barr-Root: 200 (0.6%)
McKinney-Clemente: 153 (0.5%)
Baldwin-Castle: 52 (0.2%)
Write In: 160 (0.5%)
Blank: 308 (0.9%)

We had 2247 more voters in Somerville this year.