Now's your chance to cast your ballot for the 2006 Handheld of the Year! (For reference: yeah, we're including UMPCs in the Handhelds category.) Our Engadget Awards nominees are listed below, and you've got until 11.59PM EST on Sunday, April 15th to file your vote. You can only vote once, so make it count, and may the best tech win! The nominees: Asus R2H, Pepper Pad 3, Samsung Q1P, Sony Mylo, Sony Reader PRS-500, and Sony VAIO UX280P.