Ive just borrowed a bike too! Well my husband's friend has kind of given it to me, but I kind of feel I should give him something for it but I dont think he would accept it, maybe just a nice invitation to a dinner at our place will do the job.
Anyhow in my second week of commuting to work by bike, its about 14km round trip. I really look forward to it every day (30 mins to work, 35 on the way home) except for the extremely steep hill outside my house that I will have to build my stamina for.