[GnarfGnarf]

I've had some very good experiences on oDesk. One guy in Ukraine did a complete project in Flash for a really good price.

Review the applicants' portfolios thoroughly. They are a good indication of experience and ability.

The trick is to have very extensive, clear specifications. Also, oDesk is good when you need a specific technical problem solved.

Set some defined milestones, make sure they are met, bail if there are unmistakable signs the contractor can't cut it.