Accessories for the Nexus

I was looking at a forum where there were 45 pages of comments about Samsung Galaxy Nexus accessories. Some of the accessories mentioned were

• Covers for the phone - most of which can be easily found for less than $20 on Ebay and the like
• 2000mAh batteries - there was much discussion about whether these batteries really presented value for money given that they only provide one or two hours more usage. 
• Desk dock - sit your phone down on one of these and it will charge and sync to your computer. 

Which accessories did you buy and which ones did you regret?