We’ve mentioned several business anniversaries in the past few days – and today, we have another one — Illusions Hair Design (WSB sponsor) is celebrating its 30th anniversary today (photo at left shows a bright blue “thank you, West Seattle” banner out front in honor of the occasion; we unfortunately missed our chance to snap a photo of their anniversary cake first thing this morning). As do many businesses that celebrate milestones like this, they’re offering customers a gift — at Illusions, today it’s 30% off all retail items.