Few things for your calendar for Valley PR types:

Stirr – Wednesday May 10 (tonight) – 6pm onwards in Palo Alto – Sean Ness and gang’s mixer for entrepreneurs featuring one-minute presentations. JumpCut’s video-editing demo is great – uses the artificial ski slope on Fillmore Street in San Francisco.

WITI – Wednesday May 17 – 11.45am – 1.30pm in San Diego – technologies, marketing and media in the new millennium. Moderated by yours truly, we’ll talk about how youth marketing techniques can be deployed in a broader context for tech companies.

BizWorld’s Grand-Prix – Thursday May 18 – 6pm – 10pm in Burlingame – join VCs and tech company leaders for a spin round the track in aid of teaching children business skills.

Third Thursday – Thursday May 18 – 6.30pm onwards in Palo Alto – corporate blogs unplugged – communicators from Cisco, NetApp and Ingres tell us what it took to get thier corporate blogging initiatives underway.