This Saturday you can find all 50 members of Team DCist out at Harriet Tubman Elementary School in Columbia Heights, landscaping the grounds, painting the windows, and fixing up playground games for Servathon 2008. We’re thrilled so many of you stepped up to volunteer this year, and can’t wait to meet you all somewhere other than a comment thread. We wanted to take one last opportunity to ask our entire readership for $5 or $10…