Travel and hosting forms:
Pre-approval travel form (pdf)
Hosting claim form (pdf)
Out of state travel reimbursement worksheet (Excel)
SAMPLE out of state travel reimb worksheet (Excel) 
Foreign travel reimbursement worksheet (Excel)
SAMPLE foreign travel reimb worksheet (Excel)

Travel policies & procedures:
Using Non-Contracted Agencies for Airfares (Word)
Instate travel (Word)
Out of state travel: approvals, airfare, preplanning (Word)
Out of state travel: rules,rates, receipts (Word)
Foreign travel: approvals, airfare, preplanning (Word)
Foreign travel: rules,rates, receipts (Word)
Tips on organizing your travel reimbursement (Word)
http://oregonstate.edu/fa/businessaffairs/travel

Allowable Expenses:
Quick Reference Guide
http://oregonstate.edu/dept/budgets/FISManual/FIS407.htm