Twitter-icon.com has a great selection of twitter icons and buttons.
Site: groxis.com (Grokker - Enterprise Search Management and Content Integration)
Grokker provides federated content access to libraries and enterprises, presenting results in topically organized visual formats that make it easier to conduct actionable research across broad fields of inquiry.
Do you have a twitter account? If so it's important
to get as many people as possible to follow you.
Great follow me icon captures attention of the visitors
and brings more followers to your twitter account.
Choose great twitter icon for you website!