iPass ( IPAS) rose modestly Wednesday after expanding its roaming agreement in Japan with the Yahoo! BB Mobile wireless local area network service. Redwood Shores, Calif.-based iPass said the deal adds a reciprocal roaming agreement for both iPass and Yahoo! BB Mobile users. The schedule calls for iPass users to have access to Yahoo! BB Mobile access points beginning this month. Yahoo! BB Mobile is a service of Softbank BB and Yahoo! Japan, an affiliate of Sunnyvale, Calif., net giant Yahoo! ( YHOO). The news comes just a week after iPass disappointed investors by warning of a sharp second-quarter sales shortfall. Early Wednesday, iPass rose a dime to $6.10. Last September, iPass signed a roam-out agreement with Softbank BB to provide Yahoo! BB Mobile users traveling overseas with dial-up and broadband access in more than 150 countries worldwide. Under the expansion, more than 600 Japanese Wi-Fi hotspots owned by Softbank BB will become available to iPass customers. The iPass service is used by more than 500,000 unique end-users every month. iPass says it has more than 11,000 active Wi-Fi hotspots in service in 33 countries, plus Ethernet service at more than 1,500 hotels around the world.