This extension allows you to get some product information (title, description, all available images, price and meta tags values) by its Aliexpress.com url during creating new product (or updating any existing product) from your opencart admin panel

it is possible to install this extension using VQMOD or manually (of your choice)

UPDATES:
6.05.2013:some bugs fixed
18.06.2013: now you can use this extension while UPDATING any product (not just CREATING)
25.07.2013: now you can use this extension when safe_mode = On on your server
1.08.2013: image uploading improvements
10.08.2013: some bugs fixed
6.01.2014: now it also capture product price from aliexpress
7.06.2014: added new setting: “Insert grabbed data in ALL language tabs” checkbox

for support, complaints and suggestions: [email protected]

find similar extensions for some other big marketplaces here

also, take a look at the collection of similar extensions (ALL IN ONE COMPILATION):
assembly for 30+ markets