You can find someones profile by clicking on the first letter of their username then selecting their name from the list

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Results

radiotv_dj
Rae
Rain
raj
Rakel
ralali10
Rally
Rand0m
Random
Randy
RangerGirl
Raven
raver
ReallyCurious
reallydull
Red
Redshift
RedWitch
reece
ren quilang
rentgirl
reuben_agboola
Rhiannon Jones
ricochet
rightsaidfred
Ripper
River Plate
Robotmel
Robyn12
rockchick
rockinrocker
roligan
Rollins
ROMBA
Roxanne
Roxy641
rubberduck
russ