Link Mania: Web 2.0

tumblr - create a tumblelog (sort of like a blog)

notesake - takes notes online, stay organized

PDFescape - Free PDF Editor and PDF Form Filler

fileqube - free online storage

SnapPages - create websites easily

babbel - learn languages online

seesmic - online video conversation

Qik - stream video from your phone

Mahalo - human powered search engine