Seattle - Blist, the provider of an online social database service, announced on Wednesday that it has raised $6.5 million in its first round of venture capital financing, from Frazier Technology Ventures and Morgenthaler Ventures.

Maynard, Mass. - RPM Communications, the developer of a mobile blogging service called Utterz, announced on Monday that it has raised $4 million in its first round of venture capital financing, led by Morgenthaler Ventures.

Belmont, Calif. - "Building B," a start-up that is developing a set-top box that will deliver an on-demand video entertainment platform and service, announced on Monday that it has raised $17.5 million in its first round of venture capital financing.

New York - Digital Railroad, an online marketplace for buyers and sellers of professional photography, announced on Monday that it has raised $10 million in its second round of venture capital financing, led by DN Capital.