Yes, PyCon2005 falls during Holy Week. Fear not, there are some interesting-looking worship possibilities nearby. I'm not a local, it's based totally on websurfing.
Map
Yahoo! Map of nearby places of worship
Their websites (by proximity to Cafritz)
Hillel (Jewish)
St. Mary's (Episcopal/Anglican)
The United Church (United Church of Christ and United Methodist) (no German services that week - "aber schade!")
St. Paul's (Episcopal)
St. Stephen Martyr (Catholic) (not a reference to the PyCon chair) (I think)
St. Matthew's (Catholic)
Wednesday worship
6 AM: Mass at St. Stephen's
6:45 AM: Angelus & Morning Prayer at St. Paul's
7 AM: Low Mass at St. Paul's
7 AM: Mass at St. Matthew's
7:30 AM: Morning Prayer at St. Matthew's
8 AM: Mass at St. Matthew's
11 AM: Confessions at St. Matthew's
11:30 AM: Sacrament of Penance at St. Stephen's
12 PM: Low Mass at St. Paul's
12 PM: Mass at St. Stephen's
12 PM: Mass at St. Matthew's
5:30 PM: Devotions at St. Paul's
5:30 PM: Mass at St. Stephen's
5:30 PM: Mass at St. Matthew's
5:45 PM: Angelus & Evening Prayer at St. Paul's
6 PM: Dinner at Western Presbyterian
6 PM: Low Mass at St. Paul's
6:50 PM: Discussion at Western Presbyterian
7:30 PM: Tenebrae at St. Matthew's
8 PM: Tenebrae at St. Paul's
Thursday worship
6 AM: Mass at St. Stephen's
9 AM: Morning Prayer at St. Paul's
9 AM: Morning Prayer at St. Matthew's
9 AM: Confessions at St. Matthew's
11 AM: Mass of the Lord's Supper at St. Matthew's
6 AM: Mass at St. Stephen's
9 AM: Morning Prayer at St. Paul's
9 AM: Morning Prayer at St. Matthew's
9 AM: Confessions at St. Matthew's
11 AM: Mass of the Lord's Supper at St. Matthew's
12 PM: Mass at St. Stephen's
12 PM: Solemn Mass Lord's Supper at St. Matthew's
5 PM: Confessions at St. Paul's
5:30 PM: Mass at St. Stephen's
5:30 PM: Adoration of the Blessed Sacrament at St. Matthew's
5:45 PM: Evening Prayer at St. Paul's
6 PM: Communion and Tenebrae at Western Presbyterian
6:30 PM: Solemn Mass and Procession at St. Paul's
9:45 PM: Night Prayer at St. Matthew's
All Night: Vigil at St. Paul's
Friday worship
6 AM: Mass at St. Stephen's
6:30 PM: Solemn Liturgy of the Day at St. Paul's
9 AM: Morning Prayer at St. Paul's
9 AM: Morning Prayer at St. Matthew's
11 AM: Confessions at St. Matthew's
12 PM: Service at Western Presbyterian
12 PM: Stations of the Cross, with Meditations at St. Paul's
12 PM: Mass at St. Stephen's
12 PM: choral meditations at St. Matthew's
1 PM: Liturgy of the Lord's Passion at St. Matthew's
4 PM: Liturgia de la Pasión at St. Matthew's
5 PM: Confessions at St. Paul's
5:30 PM: Mass at St. Stephen's
5:45 PM: Evening Prayer at St. Paul's
6 PM: Shabbat services and dinner at Hillel
6:30 PM: Solemn Liturgy at St. Paul's
7:30 PM: Stations of the Cross at St. Matthew's