Heres some lockescreens that Swiperrat turned me onto,so we figured we would post it here for easier access.
Install Instructions:
1)Download the lockscreen of your choice.
2)Connect your phone to your pc.
3)Create a folder called MIUI Lockescreens on your sd card and copy the lockscreen(.mtz) to that folder.
4)Disconnect your phone from your pc by right clicking the usb icon in your pc taskbar and unmount your phone(Safe to remove android phone).
5)Open them app and click customize,now choose lockscreen option,then choose menu and import from sd card.
6)Find the folder with the lockscreen and it will load it,then choose it and your good to go.
7)You can also use the lockscreens from any theme installed on your phone.See OP for instructions.
DreamLock

Download
Sidekick LS

Download
RO UI v2

Download
WP7 v1.2(Purple/Green/Blue/Orange)

Download
Simplicity

With Status Bar
Without Status Bar
Modern Sense

Download
Samsung GS MIUI v2

Download
Honeycomb

Download
10 Way Lockscreen

Download
ROU UI

Download
Colors v.1.2

Download
WP7 Dark

Download
Diagonal

With Status Bar
Without Status Bar
Evoluer

Download
Dock Lock Right

Download
Neon BT

Download
Circles

Download
Typoclock

Download
Install Instructions:
1)Download the lockscreen of your choice.
2)Connect your phone to your pc.
3)Create a folder called MIUI Lockescreens on your sd card and copy the lockscreen(.mtz) to that folder.
4)Disconnect your phone from your pc by right clicking the usb icon in your pc taskbar and unmount your phone(Safe to remove android phone).
5)Open them app and click customize,now choose lockscreen option,then choose menu and import from sd card.
6)Find the folder with the lockscreen and it will load it,then choose it and your good to go.
7)You can also use the lockscreens from any theme installed on your phone.See OP for instructions.
DreamLock

Download
Sidekick LS

Download
RO UI v2

Download
WP7 v1.2(Purple/Green/Blue/Orange)

Download
Simplicity

With Status Bar
Without Status Bar
Modern Sense

Download
Samsung GS MIUI v2

Download
Honeycomb

Download
10 Way Lockscreen

Download
ROU UI

Download
Colors v.1.2

Download
WP7 Dark

Download
Diagonal

With Status Bar
Without Status Bar
Evoluer

Download
Dock Lock Right

Download
Neon BT

Download
Circles

Download
Typoclock

Download