TGDaily reports that Intel has announced a press conference on June 26th, presumably to officially launch its Xeon 5100 processor, aka "Woodcrest." The Xeon 5100 will be available in 6 versions according to the site, ranging from 1.6 to 3.0 GHz using 1066 and 1333 MHz Front Side Busses. All models will sport 4 MB of L2 cache.
An unverified MacRumors source had previously reported that their XServe shipment had been put on hold due to a back order of parts, and according to Apple the parts would not arrive until June 26th. This would seem to indicate that Apple plans on announcing its Intel-based XServe on or around June 26th. Of note, ThinkSecret has previously reported that the XServe was not due for release until July.
Exact specifications of the rumored Intel-based XServes are still unknown.