The Asian longhorned beetle (Anoplophora glabripennis) was discovered last week in Worcester, Massachusetts, the first sighting of the species in Massachusetts (or in any of New England). Taking calls all day from concerned folks has got me beat, so rather than generating new content here, I'm going to be lame and link to this pest alert, and also decent coverage of the story from NECN.
If you think you have seen an Asian longhorned beetle in Massachusetts, I encourage you to submit a report (and maybe a photo) on the Massachusetts Introduced Pests Outreach Project website.
Update 8/8/08: The ALB has been "rediscovered" in Chicago - just a single specimen - calling the declaration of eradication into question. Scientists are not sure yet if this is a new infestation. Read more from the Chicago Tribune.