Part of the problem: Microsoft offers no digital backup for the Sidekick. My iPhone's address book is backed up on my computer, but (similar to my Moleskine addiction) I also keep a paper address book for important phone numbers — just in case. What about you? Do you have your contacts' information stored somewhere so you won't lose it?
Last weekend's server crash resulting in T-Mobile Sidekick users losing all of their data left a lot of Sidekick users understandably angry. At first, T-Mobile considered recovering the lost data unlikely, but now it seems that most of the data has been recovered and will be restored to Sidekick users shortly.