According to MMA Fighting:

MMA Fighting has confirmed that heavyweight prospect Dave "Pee-Wee" Herman has left the promotion and has already signed with the UFC.

With the SRC 17's postponement, no major Japanese fight promotion has an events scheduled for 2011. (Jorge) Santiago and Herman will not be the only foreign fighters to leave the struggling Japanese promotion. More fighters are expected to announce their departure over the coming weeks.

A date for (Herman's) promotional debut has not been set yet.

Dave "Pee-Wee" Herman (20-2)
Win Yoshihiro Nakao - Decision (Unanimous) SRC
Win Michal Kita - Submission (Omoplata) BFC 31
Loss Rameau Thierry Sokoudjou - DQ (Illegal Knees) ADFC
Win Jim York - KO (Axe Kicks) Sengoku 11

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UPDATE: MMA Weekly reports that Herman will debut in June at UFC 131 in Vancouver, against Brit, Rob Broughton.

UFC 131 coverage