You must have heard of the Android ROM, MIUI. Well, the developers of that ROM have released one of its features in the Android Market in the form of an app for Gingerbread and higher devices. That's right, you can now use the amazing MIUI Lockscreen on any phone!
Let me explain. The MIUI Lockscreen is one of the most customisable out there. You can choose from hundreds of themes all specially formatted for the MIUI platform, and now your phone.
Here are a couple of examples of great MIUI themes:
If you want to see some more lockscreens and themes, head over to the MIUI GB forums.
If you like this MIUI application, but do not want to download the full ROM - though I highly recommend you do! - have a look at these app ports. They too allow you to get a little bit of MIUI design on your non-MIUI phone.
Here they are: