Filed under: CellphonesWe've heard a lot of talk from Hop-on, makers of all those cheap cellphones that never seem to go anywhere, but the company may have bitten off a little more than it can chew with its latest trademark registration filings for "YahooPhone" and "YPhone." Yep, that's right -- those names bring to mind any massive consumer-oriented companies that might not be happy? Oh, right. There's been some speculation that Hop-on is actually developing a phone for Yahoo!, since it has some deals in place with AT&T and Verizon, but it's pretty unlikely the company is also in charge